// Conservative MPs were bullied and manhandled into backing Liz Truss in a vote on fracking, according to MPs who witnessed the scenes.
House of Commons Speaker Sir Lindsay Hoyle said he had ordered an investigation into the incident.
Sir Lindsay said he wanted members to treat each other with "courtesy and respect".
The confusion erupted on Wednesday evening after Labour brought a vote on whether MPs should get a say on the government's fracking plans.
Conservative MPs were initially told the vote would be treated as a test of loyalty to the government - a motion of confidence - and if they did not oppose the Labour plan they could get kicked out of the parliamentary party.
Tory whips, who are responsible for discipline in the parliamentary party, ordered their MPs to vote against the motion - but then just minutes before the vote, climate minister Graham Stuart rowed back on this at the despatch box where he suggested it was not a vote of confidence.
Chaotic scenes in the voting lobby followed, as whips tried to get Tory MPs to oppose the Labour motion. //
Shambolic way to run a Government,