Five times you have used the word illegal or illegally. The United Nations convention that Britain signed up to in 1951, says asylum seekers and refugees are not illegal, no matter how they enter the country.
Of course, it wasn't. He knew that and wanted her to admit it. This is what committees are for, to examine policy and try to make the minister concerned accountable.
She knew it, which is why she looked so uncomfortable. She has avoided three urgent questions in the House already.