Just got back on BA106 this morning. At DXB, BA check-in wanted to see the passenger locator form and proof of vaccination but aside from that things were as usual.
At LHR, aside from wearing a mask, everything was also completely normal No extra checks/verification.
In fact, I don't think I spoke to a single person after exiting the plane until I arrived at Paddington on HEX.

I flew out on the A380 and back on the A350..and I gotta say these are nice planes. But on the whole, I'm always going to miss the 747's.

Ground handling on the return was a joke. Lots of "boarding by group number", "deboarding by row number" but in reality...everyone just rushed the doors.
This is also normal if a little annoying. I wish they'd just say "Ready, set, go!"