I switched to the BOS-SNN-LHR routing, which gives me a 1 hour 10 minute layover in SNN. My only concern is that the CO 757 from EWR is scheduled to arrive at the same time we do, which could result in a delay at immigration. In any event, the next SNN-LHR would still get me into LHR three hours before my onward flight to HEL, so there is considerable slack in the schedule.

So, just so I am clear, will EI assign a seat and issue a BP for the SNN-LHR flight in BOS?