The whole concept of legal tender is taken rather loosely nowadays. They make silver £20 coins (with £6.50 silver content) and £100 coins (with £22 silver content) and sell them for 'face value' but I am confused about how these large denominations are all of a sudden legal tender just because the RM marketing dept says they are. As far as I can tell there has been no amendment to the laws to make them legal tender. They sell like hot cakes, £20 for £20 or £100 for £100. Shops don't take them, even a lot of banks/post offices won't take them. They sell on ebay for up to £30ish because people believe that they are proper currency. Is there anyone here with better legal knowledge on the current coins that actually are legal tender, because I'm quite sure the process is a fairly complicated one.