I wonder if Virgin still stop doing man->orlando direct anyway now they're starting to offer their own shuttle down from manchester to heathrow. I could imagine it being much easier for them to can the man->orl route and just connect passengers down to heathrow.
In truth, although I prefer direct of course, the BA manchester terminal -> london and out is nowhere near as bad as it used to be. It's actually pretty efficient so if there's a decent cost saving involved, I'd do it.

