They're Porte Baby fuselages Simon and it's a RNAS sea base which began life somewhere around 1914 on the British coast.
I think we're looking at the hangars from the direction of the arrow indicated with the sea on the other side and the photographer is in a field used for land based navy aircraft. It was handed over to the United States in 1918 under Commander Kenneth Whiting.
(The aerodrome at lower left was built in 1939 for Bomber Command)
