.
De Havilland, have been looking into the identity of the shield and, much like you, initially thought it could have been Quinton Hazell's red dragon/griffon but believe it is most likely a lion. Am trying to get a copy of both Quinton's and Denis' coat of arms.
Will certainly keep you posted on the progress of the Ferranti site. Much now accomplished and still much to do!
Red Button,
Dennisimo (aka Dennis Kenyon - former world helicopter free-style champion and former MD of Spoonair which was owned by Roy Spooner) should be along soon and will hopefully be able to answer your question.
Some more nostalgia, this from Redhill:
Westland Whirlwind WS-55 Srs 3 G-AYNP on contract to HM Coastguard seen at Redhill on 2nd September 1973. (Photo: Trevor Bartlett)
How 'Bristowers' used to train:
Hiller UH-12C G-APMR at Redhill on 2nd September 1973. (Photo: Trevor Bartlett)
S.