Plus I know you said you prefer intel, but going intel on a 1200 quid ish build will add around an extra 100-150 quid for around the same performance, so it's worth mentioning amd chips nowadays are a great choice, and that ANYTHING that allows you to spend more money on a gpu (which is far FAR more IMPORTANT than a cpu with gaming) is a good idea.
One other question is will you be overclocking now or in future at all?
This plays a big part in choosing parts for a new build.
-cost of a 'k' intel cpu will be higher, usually around 50 quid.
-how much will be spent on cooling
-need a bigger/better psu
-need a case big enough to encorperate a descent cooler. A case big enough to accommodate a noctua nh-d15 for example would be a good idea. Watercooling is great but if money is a concern a 70 quid noctua destroys EVERYTHING at that price point. Would also be quiter, if that's a concern.