A mate of mine who was ground crew with the Red Arrows in the late 60's when they were based at RAF Kemble then flying Folland Gnats and led by the ubiquitous Ray Hanna known affectionately at the time as the 'Boss' who incidentally led the team for a record four seasons.
I was told of many stories of low level antics which often consisted of 'through hangar flying' by the occasional Gnat at full chat which was of course much frowned on by the Station Groupie so naturally when one of the red anti-collision lights situated on top of a second hangar was struck by one of pilots who pulled up a tad too late after sneaking through the first hangar the order soon went round that whenever the 'Reds' were up the hangar doors had to be closed!
He also gave me some wonderful snaps of some of these low flying escapades with the Gnat but sadly I no longer have them to share but slightly off topic, I also remember seeing an X-Ray he showed me of the tail end of a Gnat fuselage showing a lost spanner lodged in there. X-Rays were routine and safety related but as he was of short stature he often got the unenviable job as chief 'foreign object' remover.
Regards
Bridon Bear