At one time the RFA vessels were basically just regular dry cargo ships and tankers, but they’re far removed from that now. I think economics will dictate building the hulls in Eastern Europe or possibly Asia (I imagine the Asians might also offer some face saving deal for our politicians if the contract was worth really going for) but I think it a little sad. The Wave class tankers have probably added to the pressure to outsource hull construction as they were expensive boats, and UK ship builders (like other Western/Northern European yards) just can’t compete on lower value contracts without major subsidy.