More photographers greeted him as he arrived at the Hyatt Hotel, with Boris telling reporters he was "here to support the party" rather than make trouble for the Prime Minister.
And he stood, rabbit in the headlights, in front of flashing cameras after getting into a lift whose doors were slow to close.
Johnson topped a national YouGov poll in mid-September, which found him to be the most respected politician in the country, more popular than Margaret Thatcher and David Cameron.
Earlier, he told BBC Radio 5 Live that it was "unverifiable" whether Cameron was a better prime minister than he would be.
And as for whether he like to be prime minister after he is done with being London mayor?
"After four years are up, heaven knows. I will be an old man."
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Although he declares himself loyal to Cameron, he has often launched blistering attacks on the government, especially over transport and his pet cause, a new London airport on "Boris Island" - recently accusing the government of "continued inertia which is being fully exploited by our European rivals".
A poll conducted by the grassroots Conservative Home found that Boris was the overwhelming favourite to succeed Cameron, with 37% of Tory members backing the mayor to take over should the Tories lose the 2015 election.
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The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
Conservative Party Conference 2012
London Mayor Boris Johnson arrives at Birmingham New Street Station before attending the Conservative Party conference today.
Conservative Party Conference 2012
London Mayor Boris Johnson arrives at Birmingham New Street Station before attending the Conservative Party conference today.
Conservative Party Conference 2012
London Mayor Boris Johnson arrives at Birmingham New Street Station before attending the Conservative Party conference today.
Conservative Party Conference 2012
London Mayor Boris Johnson arrives at Birmingham New Street Station before attending the Conservative Party conference today.
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
The Conservative Party Annual Conference Continues In Birmingham
BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)
Mobbed by the media, with fans wildly chanting his name, Britain's biggest political celebrity strode into Birmingham's New Street station.
It was a scene unlike any other in recent times, more bef...
Mobbed by the media, with fans wildly chanting his name, Britain's biggest political celebrity strode into Birmingham's New Street station.
It was a scene unlike any other in recent times, more bef...
David Cameron has denied he envies Boris Johnson's "rockstar status", just hours after the mayor was given a "celebrity-style" welcome in Birmingham as he arrived...
Boris Johnson is the prince across the water and irritatingly for David Cameron that water is only the narrow width of the Thames between Westminster...
London Mayor Boris Johnson has championed the cause of middle income families, saying they're feeling "utterly and understandably ignored", as he prepared to address the...
Boris Johnson today declined to rule out the possibility of a future bid to become Conservative leader and Prime Minister, but insisted he supports David...
he is a politian or comedian or both,liar i wach an earlier intervieu creating jobs ,he said 100000 jobs no more then 20 ,they put him in scrutuney he said i cant add up,he is big big fat liar
Talate_Giorgio: he is a politian or comedian or both,liar i wach
Boris is nice to laugh with, and laugh at. He serves an important political purpose if for no other reason than he is getting people involved in politics. People pay attention with Boris is involved, people fall asleep when it's anybody else. Does this transfer into anything tangible? Well, yes - because he's a Conservative politician that isn't being vilified in everything he says. Achievement!
Is this because he's fun, or because he's not an MP making these decisions? Time will tell, because we'll certainly see him in the House of Commons at some point in the not too distant future...
JDJF: Boris is nice to laugh with, and laugh at. He
All i know about Boris is what i see, i laugh with him not at him, but i don't know if i want him for PM. I don't know how well or not he has done for London, it's not my favourite place, then no big city is,but has he been good for London or has London been good for him.
I think those that judge him as a bumbling fool may be underestimating him, it is quite possible that what you see is away of hiding the true Boris, and you misjudge him at your peril.
The people are desperate for a political messiah, and Boris at this point is in the seat, who is that messiah other than him, the page is blank unless someone stands up and stands up now!!
dsole1948: All i know about Boris is what i see, i
I wonder if Boris has overplayed his hand. I don't see David Cameron going anywhere before the 2015 election and the London Mayor is looking increasingly disloyal and over-excited.
jrt1101: I wonder if Boris has overplayed his hand. I don't
I have no time for him at all,he is not the kind of person I like.and I also think he is a bit of a fake too,everything he does is calculated.to fool us.into believing him to be a nice man................
mrs_w_waugh: I have no time for him at all,he is not
The Huffington Post UK | By Jessica Elgot Posted: 08/10/2012 17:16 Updated: 08/10/2012 17:34