I suspect it's a plot to get the British public so fed up and disillusioned with the pound that the euro starts to look good...
Maybe the 7 coins are symbolic message. All the pieces as pieces are marginalized until they become the whole. Next they'll be the "discovery set" where each piece has a hidden word in it and when you lay them out in a line it reads:
Have You Hugged Your European Union Today?
That would be quite a marketing idea wouldn't it? They could even put other messages in 7 coin "discovery sets" to capitalize on peoples' supposed paranoia. People would have to collect thousands of coins to get all the messages.
Have you hugged the spy camera today?
You should you sure paid enough for it