I've managed to find someone that will take all of the cockerels and he has some bantam hens for sale :D
He has a chicken rescue place and they'll eventually be sold on to people that need a cockerel and hopefully they'll be bred from still.
He has some light sussex, speckled sussex and buff rock bantams all for sale, and I've reserved the 3 sussex' and may ask my aunt + uncle if they want the buff rock bantams. I wanted bantams rather than large fowl because the Brilley chickens are classed as LF but are small, so will suit bantams, and being younger the bantams will be a similar size to her.
The chicks (or some of them) are going into school today for open evening, it'll be interesting to see what people think because they haven't seen them since they were a week old!
Now I'll have to juggle intro's with the Brilley Chick and the bantams.