Percy Holt And Nowers, 42 George Street
Solicitors on George Street.
According to an entry in the September 1969 Outer London (North East Surrey) phone book (viewed online at Ancestry.co.uk), it's been there since at least that date.
Existence last checked in August 2014.
OS X co-ord: 532450 OS Y co-ord: 165587 (Latitude: 51.373897 Longitude: -0.098462)