Not sure if this will work but thought I'd post and see what people think. Base price is £799 at Currys but TCB is offering 9.1% cash back on all 4K TV's under £1000.
That's already a good deal, but I spotted on Quidco that they will double the difference if you find a better cash back rate on any other UK cash back site!
Quidco are only offering 1.65% cash back so in theory they would have to pay 14.9% cash back on this deal. That results in a final price of £679.95!?