What rules of British etiquette do you consider useful and why?​

in the UK people tend to apologize.

In the UK, people are in line.

In the UK, people say polite words and watch their conversations.

in the UK people do not talk about getting paid.

in the UK, chivalry is the best thing about man.

In the UK, shaking hands is a common way of greeting.

извини,если где-то есть ошибки...