The surge in popularity post election is marked by the Conservatives having a massive 17-point advantage, according to the latest research by Opinium. This is up from around 12 points at the election. Some 42 per cent also said they thought Mr Johnson was performing better as PM than they had expected.
The recent poll showed the Tories were up on 47 percent support, while Labour had slipped three points to 30 percent.
The Lib Dems were also down three points to just nine percent of those polled giving their backing.
Some 42 percent said Mr Johnson was doing better than they had anticipated, compared to a third who thought he was meeting expectations or falling short of them.
The findings come as Labour descends into a bitter civil war as they try to find their next leader, and will act as a stark reminder that electing the wrong candidate could push the party even further behind the Conservative Party.
Jeremy Corbyn is due to step down and there are five Labour MPs standing to replace him.
In the first hustings, Rebecca Long-Bailey, Emily Thornberry, Sir Keir Starmer, Lisa Nandy and Jess Phillips made their pitches to the membership.
Sir Keir said at the recent leadership election hustings in Liverpool “we’ve had far too much division”, while Ms Phillips said the “name-calling has been horrendous”.
Party members in Liverpool questioned them on issues from Brexit to anti-Semitism.
Sir Keir said that the unity of the party “has to be modelled from the top”.
He said: “Don’t trash the last Labour government, don’t trash the last four years.”
Although all the candidates criticised the party’s record on anti-Semitism, Ms Phillips accused some others of “keeping quiet” on the issue.
She added: “As somebody who was in the room, struggling for an independent system, lots and lots of meetings, I have to say I don’t remember some of the people here being in that particular room or being in those particular fights.”
Ms Nandy said a “collective failure of leadership at the top of the party has let us all down”.
While Mrs Long-Bailey, a Corbyn ally, said: “We can never let that level of mistrust happen again.”
Ms Thornberry said Labour “must be critical of a far-right government of Israel” but said that blaming Jews is “where racism begins”.