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))
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

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.

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 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.

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.

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

Careers / Treasurer and Trustees

We are currently recruiting for a new Treasurer and three new Trustees to join our Board. If you have experience in financial management, fundraising, digital communications and stakeholder partnerships we particularly want to hear from you!

01 Aug 2025
Read more

News / Assisted dying bill: Special series #15 - Parliament Matters podcast, Episode 103

On Friday 12 September, the House of Lords will debate the Bill to legalise assisted dying in England and Wales. We explore what lies ahead for the Bill in the Upper House with Sir David Beamish, former Clerk of the Parliaments – the Lords’ most senior official. Sharing an insider’s guide to the Chamber’s unique, self-regulating procedures, Sir David explains how the legislative process differs from the Commons, and what that could mean for the Terminally Ill Adults (End of Life) Bill’s potentially long and contested passage. Please help us by completing our Listener Survey. It will only take a few minutes.

13 Aug 2025
Read more

News / The day the King marched on Parliament: King Charles I, five MPs and the road to civil war - Parliament Matters podcast, Episode 102

In this episode we speak with historian Jonathan Healey about one of the most extraordinary days in parliamentary history when King Charles I entered the Commons Chamber with soldiers aiming to arrest five MPs. This dramatic moment, vividly recounted in Healey’s new book The Blood in Winter, marked a crucial turning point toward civil war. We explore the power struggles, propaganda, and the geography that shaped the fate of a nation and the Westminster Parliament. Please help us by completing our Listener Survey. It will only take a few minutes.

01 Aug 2025
Read more

News / Parliament gagged by super-injunction? A conversation with Joshua Rozenberg - Parliament Matters podcast, Episode 101

Legal expert Joshua Rozenberg joins us this week to unpack the legal and constitutional ramifications of one of the most troubling intersections of government secrecy, national security, and parliamentary accountability in recent memory. Thousands of Afghans who had worked with British forces were placed at risk of Taliban revenge attacks after a catastrophic government data leak in 2022 exposed their details. In response, ministers secured a “super-injunction” – so secret that even its existence could not be reported – effectively silencing public debate and preventing parliamentary scrutiny for almost two years. The breach, only revealed this week, led to a covert resettlement scheme which has already cost taxpayers millions of pounds. Please help us by completing our Listener Survey. It will only take a few minutes.

18 Jul 2025
Read more

News / One year on: How is Parliament performing? - Parliament Matters podcast, Episode 100

In our 100th episode, we take stock of Parliament one year after the 2024 general election. With a fractured opposition, a dominant Labour government, and a House of Commons still governed by rules designed for a two-party system, how well is this new Parliament really functioning? Please help us by completing our Listener Survey. It will only take a few minutes.

11 Jul 2025
Read more