I spent 6 hours at LHR GF yesterday due to the flights I was able to get with miles.
They have a QR Code ordering system now. Breakfast had a lot of options: full English, various warmed breads with either bacon or eggs or vegetable options on them and of course you can order hot or cold drinks with pastries right to your seat. That was great especially as you don't have to flag anyone down. The lunch options via the menu were more limited. Four options: vegetarian meatballs, chicken pie, a beef barbacoa burrito and one other vegetarian one.
Bacon muffin
Tea and biscuits
The buffet is back out as well. I ventured over for lunch but not breakfast.
Burger bar. This was fun.
Buffet showing the extensive cold options and sandwiches plus two soups
There were also some chicken wings and hot potatoes.
Liquor selections have further deteriorated from 2020
Champagne bar