"I finally did it! I've found a Celtic bronze! I've travelled many miles searching for one and this little beauty turned up yesterday. I have now completed my Holy Trinity of finding Celtic gold, silver and bronze coins. Technically this is made from billon but as billon is bronze with a high tin content it still counts.
The coin is a Thurrock Potin, it dates from 120-100 b.c. and is the oldest type of British Coin known."