Accident
The incident referred to was an HS125 owned by Beechams and maintained and crewed by Autair
It was Christmas eve and they had be checking out a new co-pilot in the afternoon.
They stopped for waiting for dark(,and a cuppa ) -and aircraft was ready in the evening.
The Training Captain ( Hazlehurst I think not sure !).
Took off when it was dark and were doing the engine failure on takeoff.
The aircraft crashed o to the Vauxhall factory at the end of the runway.
Being Christmas eve the assembly line was not working
With the FDR info the profile was flown on the HS 125 simulator in the USA.
I was concluded that the training captain pulled back one engine and the pupil shut down the other engine.
The end of the assembly line and the end of the building was destroyed - And aircraft !)
Vauxhall pulled in a 24 hour crew ( on Christmas eve !) and they worked round the clock. The line was running when the people returned to work after Christmas