Did they ever live in Bristol ??
Slightly off-topic, but .....
I went to Fairfield Grammer School in Montpelier, Bristol and the story was, that Cary Grant had also been a pupil there.
And because (many) kids used to carve their names in the old wooden school desks, the 'idiots' ran around looking for old school desks, trying to find one with "Cary Grant' carved in it. The 'clever' kids looked for desks with 'Archibald Leach' carvings.
Bob