I suspect that this is totally irrelevant, but this report instantly took me back some 50 or so years to a rubbish Wx, 202 Sqn callout for similar reasons. Similar initiation but in a Whirlwind 10, so NO fancy anything and the cloud was the base of a Cu Nim! They left the cloud at 12,000' - in pieces! R I P to them all - their lesson remains to be learned, it seems.