Cheapest I can find this tv which is universally well reviewed as mid/low price tv.
No 5 year guarantee, if you want that you'll need to pay £699 at John Lewis.
Also not "true" HDR, 10 bit etc but then what do you expect for this price? I have bought it to go in our family room and as a second set it is fantastic.
Still a cracking TV and I would say far better than the 55"4K LG everyone is snapping up from Curry's for £599. Just read the Which? review on that and they really aren't impressed.