From the Guardian
Woolfe was alleged to have been confronted by Hookem – the party’s defence spokesman, who served in the RAF and Royal Engineers – during the meeting. Hookem is understood to have said “a few choice words” to Woolfe about defecting to the Tories.
“Steven Woolfe has then taken his jacket off, walked over and said: ‘Right you, outside now’ or words to that effect,” a source close to the party told the Guardian. “They went outside and Steven Woolfe got the brunt of it.”
It is understood that Woolfe struck his head but walked away from the alleged altercation at about 10am, and appeared well enough to vote in the parliament half an hour later. However, he left midway through the vote and collapsed on a walkway at about 12.30pm.