LONDON (Reuters) - British Prime Minister Boris Johnson acted illegally when he advised Queen Elizabeth to suspend parliament and Johnson renewed his call for elections in Britain, the Supreme Court ruled on Wednesday.

"The obvious thing we have to do is organize elections," Johnson said as he emerged from a meeting with businessmen in New York. "The decision to advise the queen to block the parliament was illegal, because it has the effect of frustrating the parliament or preventing it from carrying out its legislative functions without reasonable justification," said Supreme Court President Brenda Hill.

Parliament's work is being suspended between September 10 and October 14, and Queen Elizabeth endorsed the decision on advice from the prime minister as required by the country's constitution.

Labor leader Jeremy Corbin called on Boris Johnson to resign and call early elections, while House Speaker John Birko said the House would reconvene tomorrow.