Originally Posted by
IAHtraveler
Regarding the baggage: Since you have a BF segment in your itinerary, you get that allowance.
Sortof.
Since the OP will be checking in for the BF flight they get that allowance. If the trip was BOS-EWR//2 days//EWR-LHR then the BOS-EWR would only get domestic F allowances even though there is a BF segment in the itinerary. One must be checking in for the segment that grants the status, not just have it on the same itinerary.