I've travelled through Heathrow, Luton and Stansted in the last six weeks.
- Luton was a breeze, no e-gates in operation but it was 2am, straight up to a desk and no need to check passenger locator etc.
- Stansted was horrific, queues didn't fit into the hall, about two hour wait, two stage process with all documents manually checked and then had to use e-gates moments after a manual passport check. This was about 6pm on a Monday.
- Heathrow T2, no e-gates in operation, but no queue for desks and no need to check passenger locator etc. This was midday on a Tuesday.