Drifting back to the thread.....
WJ916.
The 'Top Secret' aircraft of the Royal Air Force. (Well it was in 1975). A Vickers Varsity!!
The only aircraft I have seen taxy directly into a hangar (through the open doors, obviously*) and then shut down. The AF, and hangar, being overseen by 12 very big, very well armed RAF policemen.
WY-Gatow-FY
(* As opposed to the attempt later, by a different aircraft type, whose crew attempted to replicate the procedure but forgot to open the hangar doors first!)