It turned out to be a mistake to tie the trailer board on with gardening wire because one side snapped while going up a steep bit of Hardknott Pass, then despite my adding a lot more loops of wire the other side snapped when we were nearly home.
On the way up to the Lakes we stopped for lunch in Ironbridge and discovered an unusual shop that sells only useful well-made things. I bought a good quality pocket knife made by Taylor's Eye Witness and a very nice pencil sharpener. They have a website, though it looks like not quite everything in the physical shop is available online. http://www.objectsofuse.com/
Coming back we went out of our way to stop at the excellent Tebay Services/Westmorland Farm Shop. I bought a 3 1/2" tall cheese grater called Alexander the Grater which I intend to modify slightly so that it will fit into the cutlery drawer of my food bucket. [I thought I had already written a LJ entry about the Bucket but I can't find it - it's a plywood box with compartments and cupboards and carrying handles etc. that I built to carry my food around when camping and hostelling.]