Labour MPs face an official rebuke for heckling Tory leader Iain Duncan Smith in the Commons.
Speaker Michael Martin is understood to be mulling over complaints about the conduct of backbenchers as Mr Duncan Smith tried to shout his criticism of the Prime Minister's proposed constitutional changes.
The Tories claimed the incident was an "orchestrated" attempt by Government whips to drown out dissent.
In the event, Deputy Speaker Sir Alan Haselhurst was repeatedly forced to call for order. After half an hour in front of the baying mob, Mr Duncan Smith sat down as Labour MPs tauntingly waved their order papers.
The Speaker's office said "no decision has been made" on any disciplinary action.Reuse content