Sir Harold Martin died at his home in London on 3 November 1988 , and is buried at Gunnersbury Cemetery .
After retiring from the RAF on 31 October 1974 , Martin worked for aircraft manufacturer Hawker Siddeley as an advisor .
Sir Martin   died at Martin 's home in London on 3 November 1988 , and is buried at Gunnersbury Cemetery .
After retiring from the RAF on 31 October 1974 , Martin worked for aircraft manufacturer Hawker Siddeley as an advisor .