No, they really cannot. They've only just gotten it back and they would really like to keep it, so even Childermass agrees with them on that.

In any case, the explanation from Lambert is lacking and the magician can only look at him in mild disbelief.

"You'll steal whatever you want from whoever you want or wander around naked as you please. It's never bothered you before."

Everyone's seen Lambert naked by now. It's a constant.