IAN Blackford is planning to oppose royal assent of Boris Johnson’s Brexit Bill at a meeting of the Queen’s Privy Council.

According to the Record, the SNP Westminster leader has made a formal request to attend the meeting of the Queen’s political advisers – and intends to stage a protest.

The request, made to Lord President Jacob Rees-Mogg, could cause the monarch to miss the council to avoid being dragged into the Brexit debate.

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Blackford, a member of the Privy Council, acted after the UK Government vowed to ignore the wishes of Scottish, Welsh and Northern Irish parliaments and assemblies, which have all rejected the Brexit Withdrawal Bill.

The SNP MP warned that granting royal approval for the legislation after it was opposed by the three devolved administrations would “represent a serious breach of the letter and spirit of the Sewel Convention, which has underpinned devolution on these islands for the past 20 years”.

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The Sewel Convention states that the UK Parliament will "not normally" legislate on devolved policy areas without the consent of the administrations.

Blackford, speaking earlier on BBC Radio Scotland's Good Morning Scotland programme, said: "If you can argue, as the Government seems to have done in this case, that the situation is not normal, then you can always say the situation is not normal.

"What is to stop you turning around and taking powers back from the Scottish Parliament at another time?"