I'm having difficulty defining what British Britannia series coins (both Gold and Silver) I should have in my collection, especially finding out in which years non-proof coins of which denominations were issued. I've found the Royal Mint to be totally unhelpful on providing information on when they've issued such coins and the various Year Books cover it very poorly. I've been going through dealers websites and have found some info but I still don't think I've got it nailed. If anyone has the info, I'd be grateful.