Would I be right in thinking the Irish sea is a lot more brutal than the Channel?
"Immersion suits if sea temperature is 15C or less" is the rule for S&R out of Culdrose, we were told. Then you've got to extract yourself and dinghy and passengers from an upside-down sinking aircraft, all keep together, get the dinghy inflated, climb into it ... not saying it can't be done, because from time to time it is done successfully, but you're betting your life on it.