Boris and Brexit sour British PM Theresa May's party in Manchester

(Repeats story from Oct 2 with no changes)

* May contends with major distractions at party conference

* 'The pro-Brexit lot versus the anti-Boris lot'

* Divisions over Europe dominate Conservative Party

By Guy Faulconbridge and William James

MANCHESTER, England, Oct 3 (Reuters) - Besides her own diminished authority, Prime Minister Theresa May has been forced to contend with two major distractions in Manchester that threaten to rip her ruling Conservative Party apart: Brexit and her ambitious foreign minister, Boris Johnson.

Weakened by her bet on a snap election which lost her party its majority in parliament, May had said she wanted to use her party's annual conference to showcase her pledge to make the economy work for ordinary people.

Even before the conference opened, Johnson, who led the leave campaign in last year's EU referendum, provoked the ire of cabinet colleagues by repeatedly attempting to portray himself as the champion of a genuine 'bold Brexit'.

May said her cabinet was united behind her Brexit stance but when asked whether Johnson was unsackable, she laughed and sidestepped the question. Her finance minister, Philip Hammond, said there were different views on Brexit in the cabinet.

Arriving in Manchester, in northern England, Johnson said with a smile he was right behind May. He later told Reuters he was completely loyal to the prime minister and was not seeking to overshadow her at the conference, where he is popular with many activists.

"I am enjoying the conference very much and the prime minister just gave a great speech to the business lunch," Johnson said. When asked if he was seeking to overshadow May, he said: "Absolutely not."

Boris, as he is known in Britain, repeatedly upstaged former prime minister David Cameron at party conferences though after the shock referendum result sank Cameron's career, Johnson unexpectedly dropped out of the race to be leader.

May won the leadership and appointed Johnson as her foreign minister, provoking consternation in European capitals who were angry at his rhetoric - including comparing the goals of the EU to those of Adolf Hitler and Napoleon.

The chair of the Treasury Select Committee, Nicky Morgan, said Johnson should be fired if he could not be loyal to May.

"If he can't, sort of, keep schtum about his own views, if he can't give up the oxygen of publicity, because he will be delighted that everybody is talking about him right now, if he can't stop setting down arbitrary red lines, then yes, he has to go," she told the BBC.

"And the chief whip, or the prime minister, has to deliver that message."