This 1941 Model YR panel van was donated by Southampton's namesake in the US, so I suggest was from South Hampton, on Long Island, New York. Note the Civic Centre in the background...where the van is now is still a car park! The Centre was built in the early Thirties and was bombed several times starting I think in November 1940.
I have been debating whether this is a military-style Panel Delivery, because of the wheel styles.