May 1st – The Tame and Trent through Staffordshire are littered with the remnants of the Second World War, mostly old concrete blockhouses like this one in a field between Tamhorn and Hopwas. It took me a while to work out the logic of the seemingly random placements, but they all cover strategically important bridges. I guess those miltarians who planned gravely for the possible invasion of Britain recognised the value of pinch-points that rbridges formed.

Many of these fascinating structures are now listed, and there’s lots of information including a live gazetteer in Google Earth provided by The Defence of Britain Archive, a project by the University of York.