This looks to be close to the church of St. Eloi in Dunkirk, near to where I photographed Ian's truck. In fact, I think that he drove along here.
I can't see a formation sign but there appears to be an unreadable AoS plate. I wonder if the lack of formation sign on all these WOC1s is because they were used by GHQ and there was never a BEF GHQ formation sign, the only clue being the bar on the usually missing AoS plate ?