How to be British

I recently came across a web in which you can see many cards with drawings showing the typical British sense of humour that pokes fun at cultural institutions such as pubs, afternoon tea, etc. They have been created by two English teachers called Martyn Ford and Peter Legon, who have sold thousands of copies of their book "How to be British". You can see the cards in this link. And here is an example of the cards. By the way, can you spot the mistake the student of English makes? Post your comments!

How to be British
By Martin Ford and peter Legon