Good GTX 1080 with a solid 5 year warranty if you register it within a 28 days of purcahse.
Dispatched & Sold by Amazon.
Once in the basked the card is €509.50, then the shipping is only €6.70.
Paid for in € with a fee free card, including shipping it comes a total of €516.20, which translates to £453-454 depending on the card used, and exchange rate when you check out.
Link to the manufacturers specification and marketing page HERE!
If this is too big for your needs, or you wanted to spend less, the ZOTAC Geforce GTX 1080 Mini deal is HERE! and only £440!
EDIT: This is now down to €511.28, so only £448-449.