Boris Johnson resigns: Five things that led to the PM's downfall

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Less than three years ago, Boris Johnson led the Conservatives to their biggest election victory since 1987.

Now, the prime minister has lost the support of his MPs and is set to resign. How did it come to this?

The Chris Pincher affair

On Wednesday 29 June, the MP Chris Pincher - at the time, the Conservative deputy chief whip - went to a private members' club in London. In his words, he "drank far too much" and "embarrassed himself".

He was accused of groping two men, which led to a flurry of allegations, some dating back years. It set off a chain of events that ended with the prime minister's downfall.

First, Downing Street said Mr Johnson was not aware of "specific allegations" about Mr Pincher before appointing him as deputy chief whip in February. Ministers later reiterated this line - even though it turned out to be inaccurate.

On 4 July, the BBC reported Mr Johnson had been aware of a formal complaint. The next day, a former civil servant - Lord McDonald - said the prime minister had been told of the complaint in person.

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