Ref: Underground Nuclear-proof Hospital
As far as I can find out, it was a myth.
There was a surface building, covered in earth which acted as a medical facility but it was small. Two of the C hangars were kitted out to become a contingency hospital, half was actually unpacked and assembled, and the other packed ready for air shipment.
I have recently learned that the Devonair Hangars were used for storage to support medical stores and mortuary.
My information is only as good as what I discovered. to date it is written replies but regrettably no photographs. If anyone has seen any of this I would really like to to be corrected.
Our colleague WILD ROVER knows this site better than most and might help me here.
Same goes for the underground hospital at Upper Heyford.
Ian