Senior backbench MP joins Scottish Tory leader in calling for Johnson to resign over No 10 lockdown party – as it happened

William Wragg says Boris Johnson is damaging reputation of party as Douglas Ross calls for him to stand down after prime minister admits attending party

• Boris Johnson admits attending Downing Street party during lockdown
• Scottish Tory leader and senior backbencher call for Johnson to resign
• Another cop-out': constituents react to PM's lockdown party apology
• PM's authority draining away as he bets the farm on Sue Gray report
• Use of VIP lane' to award PPE contracts unlawful, high court rules

Another journalist who is very well plugged in to the thinking of Tory MPs is the Conservative Home editor Paul Goodman, a former MP himself. In what might be a rather ominous development for Johnson, Goodman devotes his main ConHome article this morning to discussing the process by which the Conservative party might go about replacing him (although he does not describe Johnson's resignation as inevitable).

Ed Davey, the Lib Dem leader, has said Boris Johnson should resign. He told BBC Breakfast:

Boris Johnson is now incapable of leading our country through this public health crisis - I actually think he is a threat to the health of the nation, because no-one will do anything he says because he has now shown to have been deceitful, so Boris Johnson must now resign ...

He said to parliament and to the country before Christmas when he was apologising that he didn't know about the parties, and now we know he was at at least one of those parties.