Yes I know it’s 5 nights the question is really is there a way to extend the holiday with an EU leg (like Dublin for 5 nights before the F flights to ORD).

if I could add Dublin for 5 nights before, I’d head out to Dublin, come back the same day on a separate ticket, then fly back 5 days later to pick up my return to LHR which would then connect to ORD for example. I’d then do 5 nights car hire in Dublin. This way I’d get double TP on the return Dublin flight plus the return transatlantic flight in F.

But I think the multi city ticket doesn’t allow a stop back in London as it won’t price it for me. If the rules don’t allow that, can anyone think of a way to do something similar?