In which case, anyone with half a brain would have put up a sign saying "no food or drink" - something that's totally acceptable and can be seen in shops up and down the country. Instead, the apparently brainless Moffet barred all foreign students from entry - something that is quite rightly illegal.
There's no excuse for a "no foreigners" sign in this country in this century. Let's hope Moffet is prosecuted; if he is, there's no limit to the fine a court can impose on him.