I bought this last week -
http://www.richersounds.com/product/tv---all/hisense/50m3300/hise-50m3300£440 with 6 year warranty for 50" 4k HDR TV with Freeview HD and Freesat HD(This isn't on the spec on RS website, but believe me it supports it, I'm using it), PVR, 2 x HDMI 2.0, USB3 enabled TV. Supports Netflix 4k and has many other apps.
Using it as my PC monitor in my lounge and to type this. Sensational value for money and the football tonight on ITV HD looked immense.
Only downsides so far are viewing angles are not great, my 27" 4k IPS panel Dell monitor destroys it in this area.
Menu system is a little laggy at times, but then I don't think I've used a smart TV that isn't.