The side light looks like a front one from a Riley 1.5.
The amber lamp appears to be the 'flat' lens type which would have been used on the back of things like Minor Travellers and Vans, but only sometimes. Otherwise, they would have used the domed lamp as used on the front of the Mini or Series LR.
The fact the fuel gauge shows litres suggests it not *that* old. Smiths offered the 2" instruments on the aftermarket as well as for OE supply, so it may not even be specific to a vehicle.