The first and (so far) only prison escape by helicopter in the UK was in December 1987. A B206 (I think) was stolen and used to spring two prisoners from Gartree, then a maximum security prison.
I have a vague recollection that it was hijacked.
Anyone remember?
I hadn't discovered the joys of helicopters in those days. My only interest was that I represented a co-defendant of one of the prisoners.