Having read 25+ pages of the thread, I think I know the answer but the wording of the terms and conditions, "double Tier Points for return flights which are part of a Qualifying Booking", still gives me a nagging doubt.
I can get the trip builder to quote me MAN-LHR-EDI-LHR//5 NIGHTS HOTEL//LHR-MAN which ought to be 40+40+40+40 x2 = 320TPs - I assume this is a qualifying booking and is a 'return flight' even if the outbound is three sectors and the inbound only one?
Many thanks.