I meant full assistance in LHR after making my own way down there. And if you are a regular flyer and experienced delays and canx with other airlines do you really believe that your flight wasn't, at some point, subject to some sort of trade off or prioritised exercise? Indeed, you might well have been on a flight that operated at the expense of another. Like I say it's a operational decision process that isn't unique to BA however inconvenient it maybe to pax.
Certainly I have seen this kind of thing at the two airlines I have worked for.