"As for tasking a SAR S61 to do the job of a 109? Really?"
Equally you might ask why you would want to go to the expense of funding a 109 at Coventry and then fly it all the way up to Scarborough for a simple transit to Hull when there was a SAR Sea King (and conventional air ambos?), for whom this sort of stuff is bread and butter tasking, sat up there doing nothing else at the time.