In another blow for Boris Johnson, Munira Mirza, Head of Number 10’s Policy Unit, has resigned from her position, blaming the Prime Minister’s Jimmy Savile attack on Keir Starmer.

James Forsyth of The Spectator has the full write up of what happened here, including extracts from a letter Mirza wrote to Johnson, which reads:

“I believe it was wrong for you to imply this week that Keir Starmer was personally responsible for allowing Jimmy Savile to escape justice. There was no fair or reasonable basis for that assertion. This was not the usual cut and thrust of politics; it was an inappropriate and partisan reference to a horrendous case of child sex abuse. You tried to clarify your position today but, despite my urging, you did not apologise for the misleading impression you gave.”

“You are a better man than many of your detractors will ever understand which is why it is so desperately sad that you let yourself down by making a scurrilous accusation against the Leader of the Opposition.”

Mirza’s departure will be particularly difficult for Johnson, who once named her as one of the five women who have most inspired him. They have worked together for over 14 years, Mirza being one of his advisers when he was the Mayor of London. A colossal wound politically – but personally even more so.

Jack Doyle, Downing Street’s Director of Communications, has also resigned.