Now what a waste of the taxpayers money that was! After the RB211 trials, during which the two RR Conway engines on the left side of XR809 were replaced by a single RB211, it was flown by Rolls Royce into the MU at RAF Kemble.
Rolls Royce proceeded to winch the RB211 off the aircraft, put it on a truck and set off through the main gate.
"Wait a minute" said the RAF "The aircraft had four Conways on it when you borrowed it so can you please put the original engine beam back on and give it back to us exactly as you found it".
"Where does it say that in the contract that you signed with us?" said RR. It didn't and XR809 was scrapped with very little time on the airframe just because some pillock screwed up the terms of the contract and it was going to cost an arm and a leg to put things back to normal.
P.S. Sorry in advance for the thread creep.