Motorcycle racing at Gatwick

[VintageBike]

Here is a request from Bill Haylor:

In the course of writing the story of Crawley & District Motorcycle Club, I'm searching for someone who has knowledge of Jack Surtees (Farther of John) and Frank Sheene (Father of Barry). They both raced at Gatwick Racecourse in 1939 before the expansion of the Airport"
 
Frank Sheene is very unwell with Senile Dementia in Australia and cannot assist. Anyone have a contact with John Surtees?