Samsung 50"-inch 4K HDR Smart TV £399 from JL + free 5 year's warranty

Black Friday Special Buy by John Lewis.
Prices are similar elsewhere but this one comes with a free  5 year warranty which is worth a fair bit.

Samsung UE50NU7020 HDR 4K Ultra HD Smart TV, 50" with TVPlus & 360 Design, Ultra HD Certified, Black