Saturday, 22 April 2017

Coastwalk

Tain → Dornoch

irn-bru.jpg Distance: 8.42 miles
Ascent: 65 metres
Duration: 2 hours 46 minutes

To the north
« Portmahomack | Golspie »

This year we're doing things differently. We've got so far north on our walk that driving all the way from home eats up two days. Instead we took the sleeper to Inverness, have hired a car and are here going to squeeze all of our coastwalking for the year into one long holiday.

So why haven't we picked up exactly where we left off in September? Buses. The Tarbat peninsula isn't served by buses at the weekend and in order to walk at all today and tomorrow we're leaving a small gap that we'll fill in a few days' time.

dornoch-bridge.jpgThis approach also means that we've been able to select an easy walk to get us back into the swing of things. Unfortunately most of it was along the road. (This may become a recurring theme of the remaining miles to John o' Groats.)

The obvious route from Tain is to follow the A9 across the Dornoch Firth. We were able to avoid some of the road by dropping to the foreshore between Glenmorangie Distillery and Dornoch Bridge.

dornoch-cathedral-windows.jpgDornoch itself is a charming small town, a cluster of distinctive buildings grouped round a small cathedral. We can heartily recommend the Carnegie Courthouse Tea Room for a post-walk cuppa.

Notes for future walkers:

  • glenmorangie.jpgWalk through Glenmorangie Distillery's grounds to reach a bridge under the railway and gain access to the foreshore (NH 767 838). The beach can be readily followed all the way to Dornoch Firth Bridge where you'll have to clamber up the embankment to reach the road. We think this route should be passable at any state of the tide.
  • At the north end of Dornoch Firth Bridge, you can escape the A9 again by scrambling down the west side of the bridge (NH 747 863) then under it to reach a track leading past a bird hide to a minor road at Cuthill (NH 749 876) which leads in to Dornoch.
    Posted by pab at 20:40 | Comments will be back one day. Please email me instead!

    Thursday, 13 April 2017

    Film

    Ghost in the Shell

    laptop-texture.jpg

    There could be an interesting story in here, but I was distracted by finding the "futuristic" visual style unconvincing. Meh.

    Posted by pab at 21:11 | Comments will be back one day. Please email me instead!

    Sunday, 2 April 2017

    Gig

    Over the Rhine, Cecil Sharp House

    over-the-rhine.jpg

    "Every American act is on an apology tour right now," said Karin Bergquist before continuing, "but I guess you have your own problems." Indeed. But hopeful music can heal and that's why I'll always try to catch Over the Rhine when they cross the Atlantic to play on our shores.

    Posted by pab at 23:33 | Comments will be back one day. Please email me instead!

    Friday, 31 March 2017

    Gig

    Nadine Khouri

    nadine-khouri.jpg

    After seeing Nadine Khouri in a support slot in Glasgow we were keen to her headline a show. Tonight at St Pancras Old Church she didn't disappoint. Opening with the first two tracks from her album set up the gig perfectly.

    Performing as a four-piece gave more depth to the sound, but I think I'd preferred her solo set. Either way she's an artist we'll be keeping an eye on in the future.

    Posted by pab at 23:40 | Comments will be back one day. Please email me instead!

    Monday, 27 March 2017

    Tech

    Pick a number

    Remember those "pick a number" mathematical games children play on each other? Here's one.

    Pick a number between 0 and 76. Now multiply it by itself 17 times. Subtract 77 from the result, and keep subtracting 77 until the number you get is less than 77. Done? Excellent.

    For example, 2417 = 290,797,794,982,682,557,415,424. You'll need to subtract 77 a total of 3,776,594,740,034,838,407,992 times reaching the result of 40. (I didn't promise you could do this trick in your head.)

    You've just encrypted a number. In the example, 24 has become 40.

    Take the resulting number and repeat the process, but this time multiply it by itself 23 times and then subtract 77s. You should end up with the number you first selected.

    Continuing with the example, 4023 = 7,036,874,417,766,400,000,000,000,000,000,000,000. Making 91,387,979,451,511,688,311,688,311,688,311,688 subtractions of 77 gives the original number, 24.

    This is an example of RSA encryption: an algorithm first described publicly in the 1970s. It's at the heart of many so-called "strong encryption" systems. The pairs of numbers 17,77 and 23,77 are the encryption and decryption keys.

    Whenever you browse a secure website, or send a secure message, this is pretty much the kind of thing your computer's doing. (Except that rather than encryption keys a couple of digits long, you're using keys hundreds or thousands of digits long.)

    I've been able to describe the encryption algorithm in just a couple of sentences. The magic is in how to select the encryption and description keys, but even that uses only basic maths and could be implemented by anyone with a pretty basic level of programming experience.

    This is why it's futile to insist that WhatsApp or Apple "assist" Governments by making their encryption breakable: if they do, those who want strong encryption will just get a teenager to re-implement strong crypto for them in about a dozen lines of code.

    The maths can't be uninvented. Dissemination of the knowledge could be outlawed, but is that really feasible? If this blog post ever disappears, you'll know that's what's happened.

    For the curious, RSA relies on carefully choosing three numbers — d, e and n — such that this property holds:

    m, m<n: mde mod nm

    Such numbers can be found like this:

    1. Think of two prime numbers; call them p and q.
    2. Multiply p and q together; call the result n.
    3. Calculate λ: the least common multiple of p-1 and q-1.
    4. Now invent a number, greater than 1 but less than λ, which has no common factors with λ other than 1; call this d.
    5. Find e, such that d multiplied by e modulo n is equal to 1.

    The encryption key is e,n; the decryption key is d,n. Don't share p, q or λ — the security of the crypto system revolves around the fact that d is difficult to derive from e if you don't know p, q or λ. Of course in practice the original prime numbers will be very large, with hundreds of decimal digits.

    For my example, p=7, q=11, n=77, λ=30, d=23, e=17.

    Rivest, Shamir and Adleman's 1977 paper that introduced the RSA cryptosystem for the first time is surprisingly simple and well worth reading.

    Posted by pab at 20:27 | Comments will be back one day. Please email me instead!

    Film

    Life

    odeon-ceiling-lights.jpgIf Hollywood made a sinister Doctor Who episode called "Squids in Space", eliminated the title character and pushed it into a downbeat register they'd end up with something very similar to Daniel Espinosa's film "Life".

    It's a big-production, brainless, box-ticking space melodrama but nevertheless a reasonable way to while away the last afternoon of a two-week holiday.

    Posted by pab at 17:48 | Comments will be back one day. Please email me instead!

    Wednesday, 22 March 2017

    Offa's Dyke Path

    Bodfari → Prestatyn

    end-stone.jpg Distance: 12.02 miles
    Ascent: 679 metres
    Duration: 4 hours 7 minutes

    Completing the circuit
    « Not walked | Colwyn Bay »

    Frankly today's been a bit of a disappointment. It started last night when I saw the weather forecast which turned out to be depressingly accurate: after a week of reasonably dry walking, I was in for another soaking.

    laughing-horse.jpgBut more than that, there were no real thrills to the walk. It felt as though all I was trying to do was get to the finishing line on Prestatyn prom, plodding on along country lanes and across increasingly muddy fields.

    llamas.jpgThere were a few notable moments: watching the clouds lift from the snow-capped summits of Snowdonia to the west; meeting two llamas who were grazing freely on a farm track at Tyddyn-y-cyll, and chatting with the woman who was out reconnoitering the route for her six-day assault on Offa's Dyke Path in August.

    I suppose I shouldn't be too down though. Today was always going to be about the end, and when the rain stopped I slowed my pace to savour the last high walk on Prestatyn Hillside before dropping down into the town.

    So that's it. The final Welsh National Trail complete, and my eighth overall.

    Where to next? I currently have two further National Trails partly complete so I'd like to knock off the rest of the North Downs Way and Cleveland Way this year. That would just leave one southern National Trail (the Cotswold Way) and four in the north (the Pennine Way, Pennine Bridleway, Yorkshire Wolds Way and Hadrian's Wall Path). It's time to set myself a challenge: I'd like to complete all of these by the time the England Coast Path officially opens in 2020. I'd best get planning.

    completers-book.jpg

    Notes for future walkers:

    • After you've finished, pop in to the leisure centre right next to the end marker. At reception they hold a visitors' book for completers to sign. I was only the second in 2017.
      Posted by pab at 16:46 | Comments will be back one day. Please email me instead!

      Tuesday, 21 March 2017

      Offa's Dyke Path

      Llandegla → Bodfari

      moel-famau.jpg Distance: 19.31 miles
      Ascent: 1507 metres
      Duration: 7 hours 2 minutes

      The end in sight
      « Not walked | Not walked »

      The theme of today's walk was set by the fingerpost sign right at the start. "Prestatyn 29" it said. This is only the third signpost I've seen with a distance to my final destination. Under thirty miles. The end is in sight.

      And then a short while later the end was literally in sight, since on attaining the Clwydian Range I saw the sea for the first time since leaving Chepstow.

      It's been a gloriously sunny day, but the cold wind hasn't quite made it t-shirt weather.

      moel-arthur.jpgThe sun has brought people out in numbers. Over the succession of hillforts that cap the Clywdian Mountains I met more people than I have for the rest of the week combined. Most popular seemed to be the walk to the Jubilee Tower that dominates the summit of Moel Famau ("mother mountain").

      From here I could see many familiar places: Prestatyn of course, but also the mouth of the River Dee at Talacre, the entire Wirral peninsula with Liverpool beyond, and way in the north the forest at Crosby. My focus though is the first of these: Prestatyn and the end of the walk.

      Posted by pab at 16:14 | Comments will be back one day. Please email me instead!

      Monday, 20 March 2017

      Offa's Dyke Path

      Pentre nr Chirk → Llandegla

      waterproof.jpg Distance: 16.02 miles
      Ascent: 743 metres
      Duration: 5 hours 28 minutes

      The rainy day
      « Not walked | Not walked »

      eglwyseg-mountain.jpgI knew it couldn't last. Ever since setting off nine days ago I've managed to stay broadly dry, but this morning I woke up to the sound of heavy rain hammering down on the roof of the B&B. I enjoyed an hour of sunshine in the middle of the day and another as I finished off the walk so it's not been entirely bad, and certainly not a patch on the downpours I endured on Glyndŵr's Way last summer. My new waterproofs have proved themselves very well.

      pontcysyllte-aqueduct.jpgThe highlight of the day was undoubtedly Pontcysyllte Aqueduct. Even without its quantitative achievements (longest and oldest in the UK, highest in the world) this would be a remarkable piece of engineering. It famously only has a protective fence on the towpath side of the canal, resulting in an exhilarating sense of exposure to the drop to the river 38m below.

      cyrn-y-brain.jpgThe weather forecast for tomorrow is much colder and dry but with very strong winds. It'll be a long walk over the mountains.

      st-tecla-window-thumb.jpg

      Notes for future walkers:

      • Accommodation is scarce in Llandegla, but the camping pod at Bryn Dŵr turned out to be perfect: basic but sufficient. (They even provided bedding, which is normally excluded in the pod.)
      • Food options are likewise limited. Be sure to arrive early and stock up from the wonderful Llandegla Community Shop.
      • It's well worth popping into St Tecla's church to find out about the nearby well and look at the stunning painted window.
        Posted by pab at 17:17 | Comments will be back one day. Please email me instead!

        Sunday, 19 March 2017

        Offa's Dyke Path

        Llanymynech → Pentre nr Chirk

        disused-railway.jpg Distance: 19.28 miles
        Ascent: 1227 metres
        Duration: 6 hours 44 minutes

        Industry
        « Not walked | Not walked »

        llanymynech-kiln.jpgAll of a sudden Offa's Dyke Path has felt the impact of industry. Immediately on leaving Llanymynech it climbs to the limestone quarries of Llanymynech Hill. (These quarries are well-worth exploring. There's a huge continuous lime kiln that inside feels like the crypt of a brick cathedral. The view from the top of the hill above the inclined planes looking back over the Severn valley is stunning.)

        Further on, the Path crosses two old mineral railways, and approaching Chirk you can't avoid noticing the plumes rising from the Kronospan factory.

        chirk-castle.jpgHaving said that's it's still a predominantly rural walk, passing the abandoned Oswestry Racecourse, a succession of small villages and lanes, and of course, Chirk Castle.

        gate-of-the-dead.jpgThe Path officially bypasses the Castle, but I took the permissive path from Castle Mill past the enigmatically titled "Oak at the Gate of the Dead" to the building and had a good look round. It's a worthwhile detour.

        Notes for future walkers:

        • The distance above includes a there-and-back detour from Castle Mill on the River Ceiriog to Chirk Castle.
          Posted by pab at 17:20 | Comments will be back one day. Please email me instead!

          Saturday, 18 March 2017

          Offa's Dyke Path

          Buttington → Llanymynech

          buttington-fingerpost.jpg Distance: 10.70 miles
          Ascent: 73 metres
          Duration: 3 hours 24 minutes

          The Severn
          « Not walked | Not walked »

          There was something very familiar about today's walk, right from the beginning. The fingerpost at the start is the first one I ever saw on Offa's Dyke Path thirteen years ago. Back then I started driving alternate weekends between Woodbridge and Aberystwyth, taking the road that crosses the River Severn at the same point as the Path.

          severn-breidden.jpgToday's route follows the Severn and then the Montgomery Canal as they make their way across the plain. Initially the Breidden Hills provide the backdrop — another familiar sight from those east/west drives, although from this side the hills reveal that they're being slowly dismantled for aggregate. At the summit sits the obelisk of Rodney's Pillar and I can't help but think back to childhood party games involving keeping a cherry atop a mound of flour while excavating scoops.

          lifting-bridge.jpgAlong this stretch I caught up with Gustavo, who I'd seen across the first field outside Hay four days ago. He's from Brazil, on holiday here, walking Offa's Dyke over two weeks before moving on to Hadrian's Wall. My schedule is tighter than his so I pushed on ahead.

          Almost precisely when the drizzle started I came across a self-service home-made cake stall outside an isolated house on the river embankment. Perfect timing!

          pentreheylin-salt-warehouse.jpgOf the entire Offa's Dyke Path, this is probably the section most capable of coping with rain. Once away from the Severn and a mile or two of Dyke across farmland, the route follows quiet roads and well-surfaced tow-paths to Llanymynech.

          Notes for future walkers:

          • The embankments shown on the map crossing fields between Buttington Bridge and Strata Marcella Abbey aren't visible on the ground.
          • If starting from Welshpool it's probably more enjoyable to follow the Montgomery Canal all the way to Strata Marcella rather than walk down to Buttington Bridge.
          • Be sure to leave time to explore the Heritage Area at Llanymynech just beyond the north of the village.
            Posted by pab at 14:41 | Comments will be back one day. Please email me instead!

            Friday, 17 March 2017

            Offa's Dyke Path

            Mellington → Buttington

            vale-of-montgomery.jpg Distance: 13.99 miles
            Ascent: 514 metres
            Duration: 4 hours 31 minutes

            Beacon Ring
            « Not walked | Not walked »

            I'd identified the first half of today's walk on the final descent yesterday. The arrow-straight line of Offa's Dyke is easy to pick out as it makes its way across the broad Vale of Montgomery. It was reminiscent of some of my coastwalks in Lincolnshire: monotously following an embankment for mile after mile.

            Relief came in the form of Long Mountain. The one climb of the day made its presence felt, rising to a commanding position above the Shropshire plains (though it's more a hill rather than the mountain its name suggests). The summit at one end — two miles east of Welshpool — is Beacon Ring, a large iron-age hill fort with a hidden message.

            beacon-ring-plantation.jpgThe fort ticks the usual boxes: a round earthwork consisting of a towering embankment and deep ditch with two entrances, and some trees in the middle. What's unusual is that the trees are rather densely planted, and obscure a trig point in the very middle which surely couldn't have been used since planting.

            The mystery is solved from the air. The trees are mainly beech, surrounding a small number of fir. They were planted in 1953, and at the right time of year the firs depict the monogram EIIR. The main question remaining for me is why commemorate the coronation in this way on top of a hill where so few people can see it? Had the same arrangement been made on the slopes the message would've been legible from the plains below, as is the case with the V of trees above Plumpton on the South Downs, commemorating Queen Victoria's Golden Jubilee.

            From Beacon Ring it's downhill all the way to the end of the walk where the Path crosses the River Severn, last seen at Sedbury Cliff on day one.

            Posted by pab at 14:41 | Comments will be back one day. Please email me instead!

            Thursday, 16 March 2017

            Offa's Dyke Path

            Knighton → Mellington

            dyke-through-garbett.jpg Distance: 15.47 miles
            Ascent: 1227 metres
            Duration: 6 hours 17 minutes

            Halfway
            « Not walked | Not walked »

            The last time I set out from Knighton I was heading for Welshpool on Glyndŵr's Way. I'll be there again in two days' time, rather than the eight days it took me last year.

            Today's walk is said to be the toughest of the entire Path. Pah! It's not that fearsome if you're used to coast walking or have recently completed the longer route to Welshpool.

            dyke-by-drewin.jpgToday's walk was remarkable. Once again the Dyke was present for most of the route, but this time I somehow felt more connected to it. I've learned to read the landscape and can pick out the Dyke in the distance. It's the thing that looks like a field boundary - a line of trees or a hedgerow - but a boundary that is uninterrupted by roads and rivers. It just keeps marching over the landscape in the same direction, paying no heed to topography.

            halfway.jpgAlso of note on the route is the halfway point of the entire Path. I'm now nearer Prestatyn than Chepstow, and I'm finally allowing myself to believe that I'll complete the whole thing in this one trip. (But I've still another six days' walking to get there.)

            Notes for future walkers:

            • official-opening-stone.jpgIn 1971 a stone was unveiled in Knighton to commemorate the official opening of Offa's Dyke Path. Bizarrely, it isn't on the route; if you want to see it, hop west across the dyke between the Offa's Dyke Centre and the River Teme.
              Posted by pab at 20:14 | Comments will be back one day. Please email me instead!

              Wednesday, 15 March 2017

              Offa's Dyke Path

              Kington → Knighton

              ruined-cart.jpg Distance: 14.36 miles
              Ascent: 822 metres
              Duration: 4 hours 53 minutes

              The Dyke
              « Not walked | Not walked »

              A transposition of two letters, and the addition of one more, separate the start and end of today's walk. This is deeply satisfying to me. Two things made the day even more satisfying: glorious blue skies and the return of the Dyke.

              knighton-clock.jpgKnighton is the spiritual home of Offa's Dyke Path. It's approximately half way along the National Trail, was where the Path was launched back in 1971, and the town's Welsh name - Tref-y-clawdd - literally means "town on the dyke". There's a visitor centre here that sketches out the Dyke's history, but essentially all that's certain is that it is historically attributed to the 8th century king Offa and that it broadly approximates the England/Wales border.

              Perhaps one third of the length remains visible on the ground: a raised embankment with an adjoining ditch on the Welsh side. Photographs don't do the enormity of the engineering task justice; this 200-mile earthwork must have required massive effort to construct and maintain, to the extent that it's still evident 1,250 years later.

              The longest continual stretch lies either side of Knighton, making the walk from Kington an absolute joy - particularly in glorious weather. In fact, on three occasions I was so distracted by my enjoyment of the walk that I missed turnings and gates I was supposed to take.

              Sadly, although I will continue to walk on the Dyke itself tomorrow, I suspect the stunning weather won't hold.

              Posted by pab at 13:37 | Comments will be back one day. Please email me instead!

              Tuesday, 14 March 2017

              Offa's Dyke Path

              Hay-on-Wye → Kington

              red-lane.jpg Distance: 15.40 miles
              Ascent: 748 metres
              Duration: 5 hours 1 minute

              England
              « Not walked | Not walked »

              "Where are you walking to today?" asked the landlady, as I settled up this morning. "Just Kington," I replied sheepishly (after all it was to be a shorter walk than yesterday). "Kington!" she exclaimed, as if it was in a different country... which actually, it is.

              border-hergest-ridge.jpgAfter two days in Wales, I returned to England towards the end of today's walk. Not that it was easy to tell. There's nothing on the ground to mark the border; no sign, no boundary stone, not even a fence. I think this indicates just how fully England assimilated the Principality. While there's a definitively Welsh culture, the lines are blurred and without prior knowledge you'd be hard pressed to guess which side of the border Kington lies on. Only the monolingual road signs give the game away.

              whetstone.jpgBorders on our island continue to fascinate me. Just what will happen if Nicola Sturgeon gets her way and a second independence referendum for Scotland results in a new nations' frontier on our shores? Will Wales eventually seek the same treatment? What will happen then to these border towns and common grazings that straddle the line?

              newchurch-refreshments.jpgMy favourite moment of the walk was at the halfway point. The mizzle was descending as I dropped into Newchurch, so a welcoming notice on the church gate offering "Tea, coffee and biscuits" was all the encouragement I needed. Inside, self-service facilities were left out on trust. This is how to get people back into churches! Why are so many locked these days when they could be centres of hospitality?

              Posted by pab at 18:27 | Comments will be back one day. Please email me instead!