Dave Jessop from the UK saw my blogs of 12th and 17th June 2012 and sent me photos of his own ERF of a similar era. It's a 1956 with a 5 cylinder Gardner and a 5 speed David Brown box.
Dave's example has the straight bottom to the door as opposed to the ones which follow the curve of the guard. Dave tells me it is completely original and just needs rewiring and a bit of a tidy up. It would be great to see it blowing the smoke out of the Gardner and trundling down the road soon Dave.