Find Living Relatives

Thanks for the reply I have tried search all trees and friends reunited.
Yes David married The mother of those children I listed but not my grandmother.
I have received Arthur's death certificate but the death was registered by David and I have tried the address listed but nothing I am afraid.
I am at a loss now as to what to try next.

Can't see a birth for a Doreen...........

EDIT

Found it...........earlier than expected.

Have you looked in 'search all trees'?

Have you tried using Friends reunited?

Did your grandfather marry the mother(s) of his children?

Have you looked for a marriage/children for Arthur?

His death cert may give you helpful info about the informant

I am trying to trace my Grandfather David Joshua Clack born in 1924 in Brentford, he had a twin brother Arthur J Clack who is deceased. I have been trying to trace David since 2009 but have not found anything to suggest he has died so I am presuming he is alive.
I would also like to trace his daughters or any other children he had, I know of 4 daughters Doreen, Christine, Sheila and Sandra who's mothers maiden name was Brown, or any children of his twin Arthur J Clack.
Any help would be greatly appreciated, I seem to have hit a brick wall.