We’ve written about tipping in the UK more than once, and it seems to be a hot topic again.
Other people do it too: https://www.timeout.com/london/restaurants/is-londons-tipping-culture-out-of-control

Don't believe the lies
We’ve written about tipping in the UK more than once, and it seems to be a hot topic again.
Other people do it too: https://www.timeout.com/london/restaurants/is-londons-tipping-culture-out-of-control
Tipping is a genuine worry for many people.
There are countries where tipping has gone mad. Tip everyone for anything. USA, we look at you:
We think it’s out of control and we know other people do too. Everywhere you go, the hand is out. It’s the culture. Don’t pay the hotel maid and you could be fined by the hotel ($250 seems to be the going rate) for “smoking in your room”, even if you have never smoked in your entire life.
There are countries where there is no tipping. If you try, it’s an insult. People expect to be helpful, they take pride in good service, it’s the job, they should not need to be bribed before they do their work. We love you, Japan.