Some Fairmiles went on the St Nazaire raid. I didn't realise the significance of HMS Campbeltown until I read the mission history.
https://en.wikipedia.org/wiki/St_Nazaire_RaidOther naval units involved were two Hunt-class destroyers, HMS Tynedale and Atherstone, which would accompany the force to and from the French coast and remain out at sea during the raid.[12] A motor gun boat (the Fairmile C type MGB 314) was the headquarters ship for the raid, with Commander Ryder and the commanding officer of the commandos on board.
