There is probably a Bolar12 as well, if not more. Tanker escort returned to Mildenhall after the refuel.
BOLAR11 is now in Czech airspace, orbiting west of České Budějovice @ FL160. KC-135 HUSKR75 is in a pattern there as well, FL220.
Erik
Edit: the previous Bolar11 flight mentioned on this board was a 4-ship indeed, see
here. And as I type this, they are still orbiting...
BOLAR11 &
HUSKR75 @ADSBExchange.