On Apr 17, 12:17*pm, Alan White

This was FIDO, Fog Investigation and Dispersal Operation.
The fuel was, in fact, petrol usually obtained from the airfields own
fuel dump.
During the war I lived near Blackbushe where a lot of the development
was carried out and can remember seeing the glow in the sky when the
system was under test. *
--
Alan White

snipped various

... For a full and highly readable account of FIDO, I can recommend
"Flying through fire, FIDO - the fogbuster of World War Two", by
Geoffrey Williams.

Hartfordbridge (later, after D-Day, Blackbushe) was used as a civilian
back-up to Manston in it's FIDO role until 1958, though according to
this publication, the last 'operational' use of the installation was
much earlier.

Martin.
--