Not according to the radio program i heard, as its a public service, they can advertise to specific sections of society so they can fill roles to give a balanced view
they used to say " preference will be given to CANDIDATES FROM A
BLACK, ASIAN OR NON-WHITE ETHNIC MINORITY BACK-GROUND " but still had others apply, to save time and money ( the license payers money ) they can target specific types
this was on 1extra