Most interesting. I think the big Cunarders also few blue ensigns because they were registered auxiliaries as well. I think there were a few RNR and formerly RNVR people in the RFA before we became sponsored reservists ourselves. I had considered joining the RNR to fill my copious amounts of leave. Not allowed to now. Yes the river police and MoD police launches have blue ensigns. Do you have any recollection of Merchant captains flying Blue ensigns for being ex RN or having a portion of ex RN men in their ship's company? I think this has been discontinued but did used to happen.