That looks like a Cromwell B.
You're right if a Cromwell IV is almost or exactly the same as I checked. I can do that with many old cars. Desert Rats
There's a patch between the A38 and the River Severn in Gloucestershire which is virtually cut off and as a result kept all its old direction signs. I didn't plan to go that far but managed it, and although I knew there were around eight (nine at least now I've checked) got six of them just by covering as much of the few villages I knew they were in as I went. I may go back for the other three eventually. Most have just been repainted as they are designed for.