Boris Johnson has warned the country’s most senior judges that the courts have “no jurisdiction” over his decision to suspend parliament and they risk “entering the political arena”.

The Supreme Court began on Tuesday to hear two appeals relating to the five-week prorogation of parliament, which has been ruled by Scotland’s highest civil court to be an unlawful attempt to dodge MPs’ scrutiny of Brexit.

Accusing the Scottish judges of having a “fundamental misconception of how parliament operated”, the prime minister’s written submission said that it would be “constitutionally inappropriate” for the judiciary to intervene.

The 11 Supreme Court judges began yesterday to hear two appeals over the prorogation of parliament. The suspension was said by Lord Pannick, QC, to be the worst abuse of power by a prime minister in 50 years

The UK’s highest court is attempting to resolve two contradictory appeals. The first, by lawyers for the businesswoman Gina Miller, is against a ruling by the High Court of