Hi Bob
Though it is less likely your biological father is still alive other members of his family may be and this could well be a sensitive issue for them as well as obviously for yourself. Rootschat is really about searching for ancestors and not coming forward to search for (or possibly involve) what might be living or potentially living people.
There is guidance on Rootschat for searching for relatives in more recent periods of time.
http://www.rootschat.com/forum/index.php/topic,142443.0.htmlYou might also want to search the electoral rolls held at Hillingdon Heritage Centre for the 1930s as you have a possible address.
http://www.hillingdon.gov.uk/index.jsp?articleid=9556FreeBMD is where volunteers have transcribed the civil registration
http://freebmd.rootsweb.com/cgi/search.plcoverage so far
http://freebmd.rootsweb.com/progress.shtmlThe registration district for Hillingdon would be Uxbridge.
If anyone has any personal information about this family could they please use Rootschat personal messaging system.
Regards
Valda
co-moderator London and Middlesex