He told the Commons: “This is a test for the House this evening, do not wait for the committee stage. Legally, morally, ethically, the right thing to do is to vote down this Bill tonight and this House must be accountable.
“Do not follow the Prime Minister in acquiescing in breaking the law because if you vote for second reading tonight, that’s exactly what you’re all doing.
“So this is a test and I understand the challenge that Conservative members face – don’t support the Prime Minister by breaking the law this evening, it is as simple as that.”
Mr Cash: “On the question of international law, such law comes in all shapes and sizes. There are many instances of express overriding UK statute law.