Our Brown English Leghorn Bantams are fantastic layers WoodlandsDevon. So good at converting feed to eggs that we exported them with us -80 grammes of feed a day gets you a 45 to 50 gramme egg 6 days of the week. The White variety will be far easier to source and may be better layers. We have only had a few instances of broodiness and simply taking them out of the nest box a couple of times sorted it.
So I agree with Bodger -White Leghorn Bantams are the way to go.