Tarq57, the post I've been waiting for, thank you. The crosser would in fact be holding at deemed separated points (from final approach) before being instructed to cross.
Is your post referring to a tower controller applying the separation or an approach radar controller applying the separation?
Approach radar.
And HD, thanks for the advice. Any query I post on here will no doubt always be put past my instructors too. Why not also make use of this forum for a bit more help though?!