now i know the OP is in uk those are Black Rocks
and the Black Rock is a renowned scotttish breed of hybrid and pullets have the black dot
i have kept these chicken from chick
they wont be barred as they get older trust me ;)
btw if its not a black rock its not a Cockeral
the Silver...
i think they are black rocks and the dots on head says pullet as black rocks are sexlink
or they could be silver sussex
so 2 pullets and a roo unless that other has a dot aswell