[David_Hayward (RIP)]

The rego appears to be a London 1947 one, and is that a Humber behind? The location for those who don't know is Parliament Square, and behind is St Jame's Clocktower, aka Big Ben (the big bell in the tower). Behind the photographer and to the right is Westminster Abbey. The view is facing south towards the Thames. It appears that behind is an Austin FX3 taxi and behind that an Austin 12hp taxi? The FX3 appears to have a LL- rego so that dates it to at least 1950.

The phone number on the wrecker appears to be AMB 4141..AMB... exchange. Don't know that one! Sorry....in those days exchanges used the first three letters of the exchange, e.g. MAYfair 1234.