Me also/simularly needing 4x BA metal flight segments. All my coming earning 1520 TPs on MH metal July-Aug2016 but zero BA flights as my BAEC membership reset to zero flights on 9th March.

o My Booking to get 4x BA credits uses LHR-MAN HBO fare (rtn), followed by LHR-AMS rtn
o I have not flown domestic MAN-LHR for 4years and last was on Virgin Atlantic, although I have more recent KL AMS-MAN-AMS which requires immigration.
o Not aware if my domestic MAN arrival then departure requires exiting airside or if airside transfer option exists.??
o Not sure about how Domestic MAN-LHR to International LHR-AMS transfer works at T5 LHR?? Never needed transfer at LHR from domestic flight before!

Ticket(A)
1. MH KUL-LHR T4 05:55 Tue 26Jul Arrival
(hoping Suitcase gets interlined BKK-KUL-LHR-AMS as AMS on separate BA ticket)
transfer airside T4 to T5
Ticket(B)
(2hr 10min to get from T4-T5)
2. BA LHR-MAN 08:05-09:05 Tue 26Jul HBO rtn fare 1st leg
(3hours is lots of time to turn myself around )
3. BA MAN-LHR 12:00-13:10 Tue 26Jul HBO rtn fare 2nd leg
Ticket(C)
(90mins to transfer domestic arival to international departure)
4. BA LHR-AMS 14:40-17:00 Tue 26Jul econmy rtn fare 1st leg
(6day wait for 4th BA rtn flight should now be BRONZE for AMS-LHR)
(enough TPs for Silver but only 3x BA flights)
5. BA AMS-LHR 16:20-16:40 Sun 31Jul economy rtn fare 1st leg