The on line BA timetable for June MAN-LHR shows mostly A319s, a couple of
A320s & a single B757 rotation.
As I said, A drop from the old days of all B757s bar the one daily B767.
I don't know anyone these days who goes via LHR from here, I certainly don't.
My last trip via LHR was 4 years ago & that was only because my direct flight into MAN was cancelled ( thank you BWIA)