AN SNP MP has said the Tory Government is "disintegrating into a rogue state" after they admitted to signing last year's Brexit Withdrawal Agreement in a rush.

A Downing Street spokesperson said the deal was "agreed at pace at the most challenging political circumstances".

Pete Wishart, who represents Perth and North Perthshire, said: "What we're seeing today is a Government disintegrating into a rogue state, trying to defend its illegality whilst rewriting history on an almost Soviet scale. They somehow think that they will be believed...."

The No 10 spokesperson added: "The withdrawal agreement and Northern Ireland protocol aren’t like any other treaty. It was agreed at pace at the most challenging political circumstances to deliver on a clear political decision of the British people.

“It was always written on the basis of the joint committee process where we would sit down with the EU and work through some of the ambiguities within.”

READ MORE: Downing Street officials admit last year's Brexit deal was signed in a rush

Ministers are adding new laws that re-interpret the withdrawal treaty to the Internal Market Bill, due to be tabled in the Commons today.

The legislation, which has been branded a “power grab” on Holyrood by the Scottish Government, aims to ensure goods from any UK nation can have unfettered access to any other nation.

On the Internal Market Bill's “notwithstanding" provisions, the No 10 spokesperson added: “We are taking limited and reasonable steps due to exceptional circumstances we find ourselves in."

On Monday Number 10 yesterday insisted the new powers were “limited” and were needed to bring clarity to the protocol, but the plans have sparked anger in Brussels and among opposition politicians.

READ MORE: Tories admit they're going to break law 'in limited way' with Brexit power grab

The UK Government's top lawyer quit his job due to a dispute with Downing Street over the matter.

Jonathan Jones was apparently “very unhappy” about the move.

READ MORE: UK Government's top lawyer quits over Boris Johnson's Brexit plans