As Title just bought this myself,
Found the cheapest website with a store/shop facility and then got John Lewis to do a price match, So getting a good price together with the 5 year warranty and local source.
DirectTVs.co.uk are in Huddersfield and have a store...You can contact any john lewis for price match, but pass on the Cheadle store who have already verified undersale.
Both John Lewis and DirectTVs do the SAMSUNG £150 cash back so the pricematch would be on the £1069.97 price at direct tvs. I have successfully managed a price match at John Lewis Cheadle and Nottingham.
Was advised by the lady at Cheadle store to do a local price match just ask the JL store to get in contact with her as she has already verified the undersale price.
Her name was Julie - Undersales Team at CHEADLE JL.