What was John Longden known for?

Blackmail, Quatermass 2, Come Into My Parlour, and Quinneys

FAQ

When did John Longden die?
May 26, 1971
How did John Longden die?
Undisclosed
How old was John Longden when he died?
70 years old
Where did John Longden die?
London, England, UK
When was John Longden born?
November 11, 1900
Where was John Longden born?
West Indies
What was John Longden known for?
Blackmail, Quatermass 2, Come Into My Parlour, and Quinneys
Was John Longden married?
Yes, to Jean Jay