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
Teddy Bear site
The Harrison Bear site, now nearly 30 years old, has been revamped a bit and more content is to be added: http://www.harrisonbear.co.uk/