Why are Private Members' Bills debated on a Friday in the House of Commons?

Publications / Guides

Why are Private Members' Bills debated on a Friday?

4 May 2022

Debate in the House of Commons chamber. (© UK Parliament / Jessica Taylor (CC BY-NC 2.0))

Thirteen Friday sittings are set aside in the House of Commons each Session for consideration of PMBs, signifying a commitment to provide some freedom from the normal constraint that 'Government business shall have precedence at every sitting' (Standing Order No.14(8)). Unless the House decides otherwise, these are the only Friday sittings held each Session.

Last updated: 4 May 2022

How much parliamentary time is allocated to Private Members’ Bills each Session?

Cumulatively, 13 sitting Fridays amounts to 65 hours of parliamentary time for consideration of PMBs each Session, each Friday sitting being five hours in length (9.30am-2.30pm).

This time can be encroached upon by petitions, Urgent Questions, Points of Order to the Speaker, and government statements.

A few additional sitting Fridays may be provided if the Session is of extended length (as for example in the 2010-12 and 2017-19 Sessions).

The government can make additional time available other than on Fridays to facilitate discussion of a PMB if it wishes, but it is rare for it to do so.

The first seven Fridays: Second Reading debates

After a bill is introduced at First Reading, the Speaker will ask the MP 'Second Reading what day?'

The MP must name an available Friday sitting day.

The first seven of the 13 sitting Fridays are set aside for Second Reading of Ballot Bills: those MPs who secured the top seven places in the ballot thus have the first choice of dates.

MPs outside the top seven are likely to be listed second or third on the Order Paper on the Friday that is chosen, and their bills will therefore have less chance of being debated.

The 8th to 13th Fridays: the ‘slaughter of the innocents’ and the order of precedence

The remaining 8th to 13th sitting Fridays are dedicated to consideration of those PMBs that have made most progress.

The 13th and final sitting Friday allotted for PMBs - colloquially known as the 'slaughter of the innocents' on account of its attrition rate - is largely taken up with Lords amendments.

At this point, a complex order of precedence dictates which bills can make use of the remaining time. This order of precedence includes:

consideration of Lords amendments;
Third Readings;
new Report stages;
adjourned Report stages;
adjourned Committee proceedings;
bills appointed to Committees of the Whole House; and
Second Readings.

Non-sitting Fridays

A backbencher can also lay down a PMB for consideration on any non-sitting Friday.

In the event that sitting days are extended (as happened in the longer-than-usual 2010-12 session) then the PMBs on the Order Paper for these new sitting days have priority.

Cite this

Hansard Society (2022), Guide to Private Members' Bills, (Hansard Society: London)

Latest / Highlights

News / Parliament Matters Bulletin: What’s coming up in Parliament this week? 17-21 November 2025

The assisted dying bill will have its second Committee Stage sitting in the Lords. Home Office, Transport, Energy and Northern Ireland Ministers will face oral questions in the Commons. MPs will scrutinise the Northern Ireland Troubles Bill, the Border Security, Asylum and Immigration Bill, and the Biodiversity Beyond National Jurisdiction Bill. Backbench MPs will lead debates on International Men’s Day and on Injury in Service Awards. In the Lords, scrutiny continues of the Crime and Policing Bill, the Employment Rights Bill, and the Tobacco and Vapes Bill. Select Committees will question the Work and Pensions Secretary and several junior ministers and will examine issues such as children’s care, digital ID, home ownership, cryptocurrency, fiscal policy, and clinical negligence.

News / Assisted dying bill - special series #18: A conversation with the Bill’s sponsor, Lord Falconer of Thoroton - Parliament Matters podcast, Episode 115

In this episode, we are joined by Lord Falconer, the Labour Peer steering the Terminally Ill Adults (End of Life) Bill through the House of Lords. Although he has attempted to legislate for assisted dying several times before, this is the first occasion he is working with a bill that has already cleared the House of Commons. In a wide-ranging conversation, he explains why this issue has driven him for more than a decade and assesses the Bill’s prospects of becoming law. Please help us by completing our Listener Survey. It will only take a few minutes.

Briefings / Assisted dying - The Terminally Ill Adults (End of Life) Bill: Rolling news

Stay informed with updates and analysis on the Terminally Ill Adults (End of Life) Bill as it moves through Parliament. Learn about the debates, procedures, decisions, and key milestones shaping the assisted dying legislation.

Blog / Assisted dying bill: How does Committee Stage work in the House of Lords?

The Terminally Ill Adults (End of Life) Bill – the Bill to legalise assisted dying – will begin its Committee Stage in the House of Lords on Friday 14 November. In this blog, we explain how Committee Stage works in the House of Lords, including how the House debates and decides on amendments, and how long this stage is likely to take.

Briefings / The assisted dying bill: A guide to the legislative process in the House of Lords

Having passed through the House of Commons, the Terminally Ill Adults (End of Life) Bill - the Bill to legalise assisted dying in England and Wales - must now go through its legislative stages in the House of Lords. This guide explains the special procedures for legislation in the House of Lords, and for Private Members’ Bills in particular. It answers some frequently asked questions, including how Peers might block the Bill, and gives an explanation of each stage of the process, from Second to Third Reading.