UK regulations are now such that you cannot take honey for sale from comb in which brod has been laid.
If your brood box is big enough - why not use them? I ran all my colonies with them last year, and provided you follow the #1 rule which is if you stick a box of foundation on, as the 1st super - it really should have at least one drawn comb in it above the brood nest, or even a part drawn one.
This is essential to encourage the bees up. Once they come through then everything is fine - full boxes of foundation can be used above that - its just 1 frame in the box should be drawn in the first super above the excluder if you can help it.
If you are beginner, clearly you do not have drawn comb, so you could start the process by putting in a single frame of super into the brood chamber just for a few hours/day, just so they "start" work on it, then move it up. In this way, their is no chance the queen will try to lay in it.