« Reply #3 on: Saturday 18 September 21 14:41 BST (UK) »
OK if your dad was born in 1963 then presumably he is still in the land of the living? Rootschat has a policy of no living persons to prevent spamming etc.
His birth certificate would tell you the names of his parents and from that you should be able to find your grandparents marriage record.
Are the grandparents still alive?
Ashford: Somerset, London
England: Devon, London, New Zealand
Holdway: Wiltshire
Hooper: Bristol, Somerset
Knowling: Devon, London
Southcott: Devon, China
Strong: Wiltshire
Watson: Cambridgeshire
White: Bristol
Windo - Gloucestershire, Somerset, Wiltshire