Scan has this for preorder for £565, due on the 10th dec:
https://www.scan.co.uk/products/8gb-powercolor-radeon-rx-vega-64-red-devil-14nm-4096-streams-1417mhz-1607mhz-boost-945mhz-hbm2-dp-hd
Bit faster than a 1080, but £60 more expensive than a 1080 with a proper cooler - probably not worth it, unless the price comes down or you want adaptive sync