"Welcome back to our place of work," House of Commons Speaker John Bercow told MPs, before saying he would ensure the prorogation was "expunged" from records and is instead listed as "adjourned."

This comes after the Supreme Court ruled unanimously Tuesday that Johnson's decision to unilaterally prorogue Parliament until mid-October -- just two weeks before the UK is due to leave the European Union -- was "unlawful, void and of no effect."

Critics quickly called for Johnson to resign in the wake of the decision, but the Prime Minister was defiant, telling reporters in New York as he was at the United Nations General Assembly that while he had "the utmost respect for our judiciary ... I don't agree with the verdict."

Prime Minister Boris Johnson arriving back at Downing Street after attending the United Nations General Assembly.

While Bercow confirmed that there won't be Prime Minister's Questions, which normally takes place on Wednesdays -- where Johnson could have faced a grilling -- he said there was "scope" for urgent questions, ministerial statements and emergency debate applications.

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