Martin Fletcher in the New Statesman:

Partygate is not about left versus right, or Remainers versus Brexiteers. It is about decency versus indecency, honesty versus dishonesty, right versus wrong. Mirza, educated at an Oldham comprehensive, gets that even if Rees-Mogg, educated at Britain’s most prestigious public school, does not.

Exactly. If Johnson continues clinging on, he and his moral vacuum of a circle will continue undermining whatever good reputation the Conservative party has left.