Originally Posted by
meownew123
I only want to do 5 nights hotel accomodation for part the trip, on a multi-leg trip flying LHR -> Boston -> NYC - > LHR!
This is fine. The red text about double TPs only shows for super simple itineraries. Nobody who has met the letter of the terms for double TP has yet posted here that they have been denied.
For the car question, I don't really know, but if you book it and collect it I can't see why that would be a problem.