Opposition parties often submit amendments to bills, but it seems like they usually fail since the government uses its majority to vote against them.

How often do opposition amendments succeed?

  • 1
    This would benefit from a timeframe definition, because the answer very largely depends on the makeup of the Parliament. The 2017 Parliament was an exceptionally good one, but also a very different one to normal in this regard.
    – Dan Scally
    Sep 2, 2021 at 22:55
  • If brexit created an anomaly then that's worth mentioning in an answer.
    – user
    Sep 2, 2021 at 22:59
  • 3
    Is there a difference between an amendment designed to make the opposition support it and one designed to kill the bill?
    – Joe W
    Sep 2, 2021 at 23:10
  • @user it's not so much Brexit itself, but the lack of parliamentary majority for the government in 2017. If the 2017 result had mirrored the 2019 one, Thresa May could have ignored either the hard brexit, or the pro-remain side of her party and still passed her Brexit legislation without needing opposition votes.
    – Jontia
    Sep 3, 2021 at 8:05
  • @Jontia would be interesting to see an analysis of majority/minority size vs. how likely an opposition amendment is likely to pass.
    – user
    Sep 3, 2021 at 10:04

2 Answers 2


Opposition amendments very rarely pass when the governing party holds a majority in the House of Commons. In the last twenty years, no majority government has been defeated by an amendment tabled by the opposition in the House of Commons. The only defeats have been by rebel amendments tabled by backbench rebels from the party in government supported by the opposition - for example, the Cameron/Clegg coalition government's defeat on an amendment to the EU Multiannual Financial Framework in October 2012. On two occasions, opposition amendments passed in the House of Lords have been upheld in the Commons - these came under the Blair government in 2006 on two amendments to the Racial and Religious Hatred Bill.

The last time that an opposition amendment was successful against a government holding a majority in the Commons was in March 1993, when an amendment to the European Communities (Amendment) Bill - which implemented the Maastricht Treaty - proposed by Labour MP Dr. John Cunningham was passed.

Against governments with a minority, though, opposition amendments pass far more frequently. During the period between 2017 and 2019 when first Theresa May and later Boris Johnson governed, many opposition amendments passed - mostly on issues relating to the UK's withdrawal from the European Union, as well as a defeat on the Finance Bill in 2019; the first time a government had been defeated on a Finance Bill in over forty years. In one defeat in September 2019, the government simply didn't provide tellers for the No lobby, meaning an amendment proposed by Labour's Stephen Kinnock passed without a vote (see this related question).

A contributing factor to this is because amendments proposed by the opposition or passed in the House of Lords with sufficient cross-party support to succeed in the Commons are often handled by the government with a compromise amendment, known as an amendment in lieu when referring to a Lords amendment, in order to head off a backbench rebellion.

For example, the Johnson government was recently defeated in the House of Lords on two amendments to the Trade Bill, which sought to prevent the government from entering into trade deals with countries found by the High Court to be committing genocide. When the bill returned to the Commons, the government proposed an amendment in lieu, which included this provision, but instead gave the decision on pursuing such deals to Parliament. The Lords amendments were narrowly defeated, and the government amendment passed.

  • 2
    Thanks, that's a great answer. An opposition MP was talking about the amendments they were going to put forward, and you confirmed my suspicion that it's just posturing and has zero chance of actually making any difference. In British democracy the opposition is mostly impotent.
    – user
    Sep 3, 2021 at 16:10
  • 1
    I think there have been amendments originating from the opposition, that have been accepted by the government (and then become government amendments) These are perhaps more common in committee than on the floor of the house.
    – James K
    Sep 3, 2021 at 17:53
  • @user posturing is a harsh description. What other tools do the Opposition have after all?
    – Jontia
    Dec 24, 2023 at 9:46
  • @Jontia it's more about honesty. If they can't do anything meaningful then they should just say so.
    – user
    Dec 25, 2023 at 2:55
  • @user, well the opposition could just pack up and go home after coming second in an election. Given the UK's FPTP and whipping system that would probably be honest, but I don't think it's a good idea.
    – Jontia
    Dec 25, 2023 at 11:13


How often do opposition amendments succeed?

Depends how good the author is at politics. Bernie Sanders is famous for getting amendment passed in the Congress. He caucuses with the Democrats but achieved his title of Amendment King when the Senate was controlled by Republicans.

Bernie Sanders passed more roll call amendments in a Republican Congress than any other member.

Out of 419 amendments Sanders sponsored over his 25 years in Congress, 90 passed, 21 of them by roll call votes.

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