Hi Charlie and welcome!!!! It depends on whether you want a dual purpose breed, so you get your eggs, then when the chickens are a bit older to kill and eat them, in which case, there are quite a few dual breeds, for instance the light Sussex, Rhode Island Reds, Welsummers to name a few.
or you can go down the route that Brian and I took, so we get hybrids for egg production, and at the moment we have Amberlinks (white), and Bovans Goldlines and Babcock B380's which are brown,
and for our meat we buy JA757's which are ready in 8-10 weeks (white), Coloryield ready 10-12 weeks (brown) and the Mastergris ready 12-14 weeks (grey) the coloryield were easiest to pluck, the Mastergris are the laziest and had a bit more fat on them, but they all taste lovely!!!
But they have their separate sheds and runs, we don't keep them together as the meat birds are soooo greedy, the layers would probably starve to death!!!! lol