The DUP's Brexit spokesman has supported calls for Theresa May to publish legal advice on a possible Brexit deal to assure politicians and the public that the UK is not being "trapped" in the EU.
Sammy Wilson MP told talkRADIO's Julia Hartley-Brewer he understood the "government's reluctance" to publish any legal advice, but claimed it was overwhelmingly in the public interest.
Mr Wilson said: "I can understand the government's reluctance to publish any legal advice. As a former Minister in the Irish Assembly, I know all the reasons why when you get legal advice it is for the Minster only.
"But in this case the issues are so important. The legal advice will tell us whether the deal which is struck enables the UK to leave the EU customs union, single market, the jurisdiction of the European Court of Justice, or not. And since that was the fundamental point of the referendum, I think we must be clear before a judgement is made on the deal, it must be clear what that legal advice says.
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Mr Wilson's appearance on the breakfast show followed a meeting of cabinet members yesterday, who were invited to read the elements of a draft withdrawal agreement that have been agreed with Brussels.
Theresa May has faced increasing pressure to make public the guidance given to her on post-Brexit arrangements for Northern Ireland.
"Although there's a convention that you don't publish legal advice, in this particular case for the assurance of the public that the wool is not being pulled over their eyes or that the deal which on the surface looks like it's saying one thing, but is legally still binding the UK to the EU."
He added: "Once you show it to members of the cabinet it's going to be made public anyway so the government may as well."