On Oct. 15, old-type one pound coins were officially expired in the UK.
Mirror: When does the old £1 coin expire? Brits only have hours left to cash in round Pounds before they become void
The old one pound coin has been very familiar to me, and maybe to all Britains. It was introduced in 1983. The gold shape was solid and attractive.
However, it was said that many fake coins were spread in the market. Fortunately, I have not seen artificial ones when I was in London. But it was possible that I used ones unconciously.
Therefore, the government has replaced the old coins to newly developed ones. The new one pound coin is not round. It has twelve angles and silver, covered by a gold edge, similar to the current two-pound coin.
Now, banks and stores no more deal the old coins. If you have a cash account in some popular banks such as Lloyds, you have a chance to exchange them there.
Also in Japan, old 500 JPY coins were expelled suddenly in 2000 because of a rapid increase of fabricated coins. In recent years, Japan has no need to replace coins, fortunately.