You are in a hangar on a farm where the prototype de Havilland Mosquito aircraft were built in 1941 in great secrecy, lest the Germans got wind of this fast fighter-bomber.  The yellow fuselage is what remains of one of the four original prototypes.

The hangar is situated just five or six miles from Hatfield in Hertfordshire which was the home of de Havillands, is currently a museum not just for the Mosquito but many other de Havilland aircraft, both military and civilian.  More about the museum at

http://www.dehavillandmuseum.co.uk/index.html