Things to do in Britain

We have just applied to host some foreign students in the Summer holidays and as part of application had to list 5 activities we would take any visitors on which they would associate with being in the UK. I came up with a list of a few but then saw the list that the students had :-

1) Eat fish and chips

2) Have afternoon tea

3) Eat a Cadburys creme egg

4) Go on the top deck of a London bus

5) See a bobby on the beat

6) See Big Ben

7) Watch the Changing of the Guard at Buckingham Palace

8) See the White Cliffs of Dover and eat a stick of rock

9) Go to Harry Potter World

10) Visit Windsor Castle

I'm not sure whether all of these are still uniquely things you can do in the UK ? What would be on your list ?