PRIME Minister Boris Johnson was acting illegally when he advised the Queen to suspend Parliament for five weeks ahead of Brexit, the UK's Supreme Court has ruled. 

A panel of 11 judges announced their decision this morning following a historic hearing in London last week.

Lady Hale said prorogation is "void and of no effect" and should be quashed. 

"Parliament has not been prorogued."

The Supreme Court judges heard appeals over three days from September 17 arising out of legal challenges in England and Scotland – which produced different outcomes.

The National:

In Scotland earlier this month, a cross-party group of MPs and peers, led by SNP MP Joanna Cherry, won a ruling from the Inner House of the Court of Session that Johnson's prorogation decision was unlawful because it was "motivated by the improper purpose of stymieing Parliament".

The PM advised the Queen on August 28 to prorogue Parliament for five weeks and it was suspended on September 9.

He claimed the prorogation was to allow the Government to set out a new legislative agenda in a Queen's Speech when MPs return to Parliament.

But those who brought the legal challenges argued the prorogation was designed to prevent parliamentary scrutiny of the UK's impending exit from the EU on October 31.

More to follow...