Slasher,
I concur with your post re the fuel, having as a pax personally experienced a diversion for fuel reasons with that airline. This was about 1996, LHR - KL when, during breakfast there was a sudden announcement to the tune of "Ladies and gentlemen, this is the captain speaking. Sorry to announce that we do not have enough fuel to reach our destination". There was no explanation, surprising as we were out of sight of land at the time... It must have been about ten minutes or so before a further announcement informed us that we were in fact going to Penang instead. By this time some pax were approaching a state of panic and not surprisingly, many breakfasts were left uneaten!! On arrival there was no parking space and after about an hour's delay for fuel, done with pax on board, the crew missed the correct exit back to the runway and we then had to wait for a pushback as we were up a blind taxyway. The guy sitting opposite me was pleased to be at Penang as that is where his business meeting was - unfortunately, of course he was not allowed to disembark there. He suddenly realised that because of the 2 1/2 hr delay meant he was going to miss his flight back from KL to Penang and also his meeting. Therefore he would instead have to go straight back to LHR. Air-rage was imminent!
After our "diversion" I submitted a "CHIRP" report as I thought that it should be brought to the notice of those that matter in UK. My comments were "noted" and I received an abridged explanation along the lines of your post.