They are sheds, not hangars they were built to assemble airships in the late 1920's The airships were built by suspending the fuselage hoops from the walls and roof then assembling the skeleton insitu
I think the sheds came originally from Norfolk and were extended
both hrizontally and vertically to accomodate the R101 which crashed in northern France
The shed on the right is owned by the Buildings Research Establishment
it contains a 7 story bulding, an aircraft fuselage used for smoke and fire damage tests and a blast rig
The left hand one is empty but it is sometimes used by rock bands to test their light shows, some of the last Batman film was shot in it
Both sheds have their own weather system it can be raining inside and a nice day outside
I can see them from the front of the house about a mile away :lol: