European Union Bill

I am grateful to the Minister for giving way. He passed rather rapidly over Clause 14, so perhaps I may take him back to it for a second before he sits down. I find it very puzzling. If, as most of us believe, parliamentary sovereignty is absolute, Clause 18 is not necessary. If I am wrong and parliamentary sovereignty is not absolute but could be overruled by another legal order, then nothing that we say in this Bill or this Act could change that. So Clause 18, surely, is either superfluous or ineffective.