I found this little gem, at an ebay auction.
The Fighter Collection Indian logo caught my attention.
It’s a letter commemorating the Dowding Memorial in 1988, signed by Air Vice Marshal Henry Algernon Vickers Hogan DFC.
Hogan commanded 501 Squadron at Croydon, during the Battle of Britain.
This letter was one of ten, carried onboard the restoration test flight of Hawker Hurricane G-HURI in 1989, flown by Stephen Grey, owner of the Fighter Collection and father of Nick Grey, which should be a familiar name for fans of DCS. Maybe you could show him this, @NineLine