Went walking in the hills near where I live and came across this well known wreck of a Fairey Firefly which crashed in 1950 unfortunatley killing the two crerwmen.
More info here
http://www.aircrashsites-scotland.co.uk/firefly_meikle-bin.htm
Wing section
Rolls Royce Griffen
I noticed that it had two spark plugs for each cylinder