Just saw this on the Royal Mint website. Limited mintage of 650. Worth buying ? http://www.royalmint.com/shop/Sir_Winston_Churchill_2015_UK_Silver_Proof_Five_Ounce_Coin
Noticed there is also a Kilo version as well with a face value of 500, but at 2000 to buy its a bit out of my price range
Gold as well if you have a spare 45k knocking around... http://agaunews.com/churchill-20th-century-giant-adorns-giant-gold-coin/