Thanks for the replies.
Yes pretty sure he was married in Singapore. We have a picture of his wife in what appears to be a wedding and it says 'Singapore' on the back. He worked in Singapore, Malay States and Bolivia as a Tin Min Engineer. He had several patents attributed to him. Daughter 1 was born in Singapore and daughter 2 in Federated Malay States. Daughter 2's own daughter is the one seeking her grandparents details.
I know he was born on Sept 24th as his daughter kept a diary and stated on that day 'Daddy's birthday today' or something to that effect in his 50s.
The details in the 1921 census are a family of 4 living at 4 Garraway Road, Paddington London. They are incorrectly listed under the surname Richanson.
William Whitehead Richanson - 53 b. Bradford
Amy Richanson - 49 b. Southport
Dorothy Richanson - 21 b. Singapore
Gladys Richanson - 17 b. Federated Malay States
The confusion over year of birth is that his daughter's diary says in 1921 he turned 56 on Sept 24th but some ship records, and the census record of 1921 have his birth year as 1867.
I have contacted the Singapore archives, and Malaysia Archives but nothing found.
Basically, I am wondering if I can look through all the Bradford birth certs for a specific birth date of Sept 24th, as that is the only thing I am sure of.