MPS COULD be sent to a "sin bin" for barracking their opponents in the chamber of the House of Commons, under proposed reforms tabled by Labour.

The new powers for the Speaker of the Commons to expel MPs temporarily from the chamber if they are persistently rowdy are included in a plan for wide-ranging reform of the democratic system.

The plan also envisages replacing the House of Lords with an elected Senate of the Nations and Regions, strengthening devolution, the introduction of votes at 16, regulation of MPs' second jobs - including a ban on paid directorships and consultancies - and a trial of online voting in elections.

Labour cited recent research by the Hansard Society, which found public dissatisfaction with MPs' behaviour at Prime Minister's Questions, with voters describing the noisy weekly confrontation between the PM and leader of the opposition as "childish", "over the top" and "pointless".

Leader Ed Miliband has said that he does not regard PMQs as "a great advert for politics or Parliament" and has proposed a new public session of Prime Minister's Questions, allowing ordinary voters to put their concerns directly to the PM.

Outlining the plan ahead of its launch at Westminster, Labour's shadow leader of the Commons Angela Eagle said: "The recent debate over MPs' second jobs reminds us that so much needs to change in Westminster. When trust in politics and politicians is already at a record low, only radical reform will restore faith in our political process.

"While the Tories and Lib Dems are stuck defending a tired and discredited status quo, Labour's plan will deliver the reform our politics needs. We will reform the Commons to strengthen its ability to hold the government to account. And we will ensure our political system always puts people before rich and powerful vested interests.

"Our politics works on an adversarial system, but sometimes MPs take it too far and it turns the public off. A Labour government will consult on new powers for the Speaker to curb the worst forms of repeated barracking."

At present, the Speaker can only discipline MPs for grossly disorderly conduct, and only two people have been ejected from the chamber for this reason since the 2010 election. In the Australian House of Representatives, the Speaker can eject any member for "disorderly" conduct for one hour on their first offence, rising to exclusion for three sessions on their second offence.