No idea yellowtriumph as I tend not to select BA.
To the substantive point about what is no longer inclusive, it is clear that BA want to have 'LCC' in Y and Full service elsewhere. They cannot jump to it in one go as that would be too obvious - but they have been playing 'Grandmother's Footsteps' for long enough to show the path.
It is a perfectly reasonable response to the changes of the last 30 years and I'm sure we shall see all main line carriers going on this route.