Forgot to add link, sorry: http://www.royalmint.com/shop/Prince_Georges_Second_Birthday_2015_UK_5_pound_Silver_Proof_Coin It looks like it is a once-off design.
Much prefer the original. Though I'd love to see a high quality image of it. I had a quick look on the Royal Mint site but it only displays low quality resolution. Quite a striking design at first glance - but strange quality on closer inspection given the available pics. Probably awesome in the hand!
Beautiful one-off reinterpretation that fits the coin perfectly, imo. Wish they'd do more like this as it's such a potent symbol and while Pistrucci's classic design is excellent, it's so common now the impact has been lost. Mik
I found this old Dragon this morning in the bottom of the safe. Pretty low mintage and only .925 silver.