Actually, the building was constructed to the standard layout for such an airfield, both before and after the "Expansion Scheme", and does in fact have much merit as such, by your logic Windsor Castle should be torn down, it certainly lacks any redeeming features and has not contributed to the survival of the free world , {or whats left of it} as Kenley has in the recent past.The old Guards Barracks in Caterham have been turned into civilian housing, the Kenley Mess deserves to be preserved, but then you may have forgotten about "The Kenley Wing", led by Johnie Johnson, that's if you ever cared about the contribution made by Canada to your survival.