Hi Steve
take a look at this site - It doesn't stipulate 40 in the Catford area, but the information on this site should help with tracing places.
http://www.flyingbombsandrockets.com/statsbypostcode.html
my own former property in Elmers End Road Beckenham, about 200 yards from the bus garage, was damaged on 18 July 1944 - however, buses were running from the remains of the garage the following day.
cheers
Allan