Yeh the Sycamore!
I did the last SAR ever with a Sycamore, which was based at CFS(H) Tern Hill in Feb 66. This was a Saturday morning and two aircraft went off for the search in North Wales and I went along as crew.
If ever the RAF could find an aircraft less suitable to be used as a trainer it was the Bristol 171. It's eventual downfall came when several crashed at Tern Hill having run out of cyclic authority, with a strong wind under the quarter.
The other reason it was the best aircraft ever operated by CFS was 'cause it was followed by the Sioux which was just great!
Old Duffer