I just wanted to add my bit. I normally only read this forum and would'nt normally dream of posting on here as I am simply not qualified to do so, so my apologies if I have overstepped the mark.
According to the book 'Testing Times' by Don Middleton, it says that George Aird got a double reheat fire warning but believed that it may be spurious, deciding to try and make it to Hatfield. Quite close to touchdown, he experienced a sudden and uncommanded pitch up (believed to be the flying surface actuator shearing off due to the intense heat), moved the stick and found that it appeared disconnected. He immediately ejected.
Maybe it explain the unusual positioning of him and the seat in the picture if he initiated the ejection sequence during the pitch up?
This was also a pre-production Lightning