I'm heading out to Brunei in May and I am looking at flight options.

ba.com shows this as a valid destination, however when I try to book it as a multi city or even from LHR it repeatedly comes back with an error message.

ITA Matrix is showing many combinations but not my ideal combination which is from from EDI, LHR, HKG/SIN on BA then onwards to BWN.

I am a basic user with ITA (still learning the ropes!) but any help would be appreciated to maximise Avios/TP's. Travelling either in Y or W unless anyone can advise of decent J fares.

Thanks in advance.

Pete