Hi bigjon,
You haven’t given many clues about your grandad.

So this is my guess. As George’s family is in Mansfield in 1911 and the children were born in different counties I can see the son John Isaac was born in Shirebrook, Derbyshire = GRO DecQ 1902 Mansfield R/D - mother’s maiden name Tenant. The family is living on Sherwood St, Mansfield Woodhouse by 1921.
It looks like George Bennett is living with Thomas & Charlotte Lambert at Clumber St, Shirebrook – Married & born Princes End, South Staffordshire, aged 58.