From Amazon.fr, in euros.
£189.98 at Amazon.co.uk
Price includes P+P to the UK but not possible exchange fees (Amazon.fr charge a lot). With a 3% credit card exchange fee around £181.
This card has 12.5% faster memory than the RX480 4GB but fewer shaders. Clock speeds the same.
Performance should be indistinguishable from a typical RX480 4GB, and around 3% slower than a GTX 1060 3GB. But with the 8GB of RAM it's more-future proof and a better choice than either.
RX470 4GB (Strix) 47.8 fps
RX470 8GB Nitro+ (this card) 53.2 fps
RX480 4GB [should be the same]
GTX 1060 3GB (Asus OC) 54.8fps
RX480 8GB (stock) 55.1 fps
GTX 1060 6GB (stock) 58.1fps
RX480 8GB Nitro+ 58.9 fps
GTX 1060 6GB (MSI Gaming) 62.1fps