In the House of Commons, MPs are beginning the final debate on The Terminally Ill Adults (End of Life) Bill.

The bill is entering its third reading and, if approved, it will go to the House of Lords for scrutiny.

If MPs do not support it, it will fail - and that will be the end of the road for this bill.

We're expecting a vote sometime before 14:30 BST.

We'll bring you key lines from the debate in the Commons and you can follow by pressing watch live above.

Sam Francis
Political reporter

MPs are voting on a second amendment about the territorial extent of the bill.

Amendment 94, tabled by Labour MP Kim Leadbeater, gives the devolved Welsh Government powers to set regulations for some aspects of the bill in Wales, and allows it to provide some services in Welsh.

• For context: At committee stage an amendment was made, with Leadbeater on the losing side of the vote, which effectively gave the Senedd a veto on the whole bill coming into effect in Wales. Amendment 94 limits, which parts of the bill, would be subject to a Senedd vote.

Sam Francis
Political reporter

We weren’t expecting this. MPs are now voting on an amendment about where the bill will come into force.

Amendment 77, by bill proposer Kim Leadbeater will enact some of the recent changes around banning of advertising for assisted dying and the rules governing when doctors provide help to Wales, Scotland and Northern Ireland.

There has been some criticism of this amendment because it extends elements of the bill beyond England and Wales - even though the issue is devolved in Scotland and Northern Ireland.

And it's passed - with a majority of 66.

Sam Francis
Political reporter

MPs have nodded through amendment 21, which requires the government to publish an assessment of palliative and end of life care within one year of the Act's passage.

MPs have agreed that ministers should get powers to update the National Health Service Act 2006, as part of the Terminally Ill Adults (End of Life) Bill.

This would include voluntary assisted dying services as part of the NHS's purposes.

Labour MP Dame Siobhain McDonagh pushed her amendment 12 to a vote, which would have blocked ministers from broadening the NHS's purposes without a fresh bill.

MPs have rejected Dame Siobhain's proposal 269 votes to 223, majority 46.

Sam Francis
Political reporter

MPs are now voting on an amendment to prevent the government from using the assisted dying bill to later alter the founding purposes of the NHS.

The bill grants new powers to the government and health secretary to alter parts of the health service.

This technical amendment – tabled by an opponent of the bill the Labour MP Dame Siobhain McDonagh - ensures these changes do not shift the NHS's focus from saving lives.

Amendment 12 seeks to ensure that Section 1 of the National Health Service Act 2006 cannot be amended, modified, or repealed through regulations. Section 1 of the 2006 Act sets out the overarching duty of the secretary of state to promote a comprehensive health service in England.

The amendment would require that any changes to this section be made only through primary legislation—an Act of Parliament—rather than through delegated powers.

Image source, UK Parliament

MPs have voted to support a safeguard which prevents a person meeting the requirement for assisted dying "solely as a result of voluntarily stopping eating or drinking".

Clause 14 is one of several amendments aimed at closing the "anorexia loophole", with the aim of ruling out people with anorexia. The amendment was tabled by Labour MP Naz Shah.

Labour MP Kim Leadbeater, the sponsor of the bill, has previously signalled her support for the amendment.

The amendment was passed on the nod, meaning it was accepted without a vote.

Next up, MPs reject a proposal to introduce stricter checks on the mental capacity of those seeking assisted dying.

This amendment 24 eliminates the presumption of capacity, instead requiring individuals to demonstrate their ability to make a decision for an assisted death.

The Commons voted by a majority of 53 (213 to 266) to reject amendment 24, which as we mentioned was tabled by Labour MP Daniel Francis.

MPs reject an amendment which would have prevented a person who is substantially motivated by feeling they are a burden, from qualifying for assisted dying.

Conservative MP Rebecca Paul's new clause 16 said that a wish to end one's own life should not be substantially motivated by factors such as a mental disorder, disability or suicidal ideation.

MPs voted 208 to 261, giving a majority of 53 against.

Sam Francis
Political reporter

We're got four votes coming up in the Commons shortly, which are proposed amendments to the bill. These will be voted on before MPs begin debating again.

One of those amendments MPs are due to vote on includes a proposal to introduce stricter checks on the mental capacity of those seeking assisted dying.

Amendment 24 - tabled by Labour MP Daniel Francis - would remove the standard legal presumption that a person has mental capacity unless proven otherwise.

Instead, those seeking to access assisted dying would need to prove they have the mental capacity to make the decision.

Jennifer McKiernan
Political reporter, reporting from outside Parliament

Sister Doreen Cunningham is sitting outside Westminster Abbey in quiet protest. Her sign reads: "Let's care not kill".

She said she was particularly worried about the time limits and people feeling pressurised.

She said: "How can you say whether someone is going to die within six months when doctors themselves find it hard?"

The sisters urged MPs to prioritise palliative care and add that different pain relief should be made available to more people.

Chris Mason
Political editor

How do the numbers look ahead of the big vote today?

Both sides reckon there has been a net movement in the direction of rejecting this bill since the last vote in November, when there was a 55 vote majority in favour of changing the law.

The question, though, is how much of a movement?

Those hoping the bill passes remain confident they will win.

And opponents are saying it is ‘too close to call’ rather than explicitly predicting they have the numbers to defeat it.

But both sides acknowledge it is difficult to be certain: MPs can vote how they choose as it’s a free vote. Some will turn up and abstain. Some might not turn up.

Chris Mason
Political editor

Image source, EPA

Some on the side of hoping this plan is defeated are putting it about that the prime minister might not vote later.

He is a long standing advocate of a change in the law — and was asked about it again earlier in the week at the G7 Summit in Canada.

He didn’t answer the question when he was asked if he would be voting today, saying: "My own position is long-standing and well-known in relation to it, based on my experience when I was chief prosecutor for five years, where I oversaw every case that was investigated."

There is no doubt he backs the principle of a change in the law and he endorsed the bill back in November.

But will he do so today?

This morning Downing Street sources insisted they hadn’t confirmed with anyone whether Sir Keir Starmer would be voting or not.

In other words, they weren’t saying definitively that he would.

Let’s see.

Let's head to the House of Commons, where MPs are turning their attention to The Terminally Ill Adults (End of Life) Bill.

First up, there will be four votes in the House of Commons on changes within the bill since it was last put to MPs in November.

Then the bill will have its third reading and, if approved, it will go to the House of Lords for scrutiny. If MPs do not support it, it will fail.

The would allow terminally ill adults with six months or less to live to get medical assistance to end their own lives. In November, MPs voted to back the bill.

We'll bring you key lines from the debate in the Commons and you can follow along by clicking the Watch live button at the top of our page.

Aisling Taylor
Reporting from outside Parliament

Protesters for and against the assisted dying bill have been standing opposite Parliament since before 8am this morning.

There are also demonstrators handing out leaflets.

Campaigners on both sides of the debate have been vocal in putting across their arguments ahead of this crucial vote.

Image source, PA Media

Helen Catt
Political correspondent

Many MPs have been in their jobs for less than a year but today they'll cast what will be one of the most consequential votes of their entire career.

Without any instructions being given by parties, it's also a decision that each individual will have to make for themselves.

It's a heavy responsibility: supporters and opponents alike recognise that legalising assisted dying would mark a huge shift in society.

Chris Mason
Political editor

It is worth mentioning that there isn’t consensus on the terminology to use around the Terminally Ill Adults (End of Life) Bill for England and Wales.

Some say "assisted dying" and this has become the most widely used short hand.

But some, particularly among the bill’s opponents, prefer "assisted suicide".

Liberal Democrat MP Sarah Olney, who is on the bill's committee, voted against it at the second reading back in November - she tells BBC 5 Live that she hasn’t changed her position.

“My concerns about vulnerable people – by which I mean people from ethnic minority backgrounds, people with disabilities, mental illness, people in abusive relationships - I am not confident we have done everything we can to build safeguards into this bill that would make it safe for them,” Olney says.

She says her worry is that that those people are more likely to “have their lives ended prematurely” if the bill passes and that not enough has been done to mitigate that risk.

Oscar Bentley
Political reporter

There aren’t any more changes to be debated this morning. The debate on amendments finished last Friday.

There are still some changes to be voted on today, however. That will be the first thing MPs do this morning, before moving onto debating the final bill as it stands and voting on that.

We don’t know exactly how many changes will be voted on. But those that could go to vote include disapplying the presumption that a person has capacity to decide they want an assisted death - essentially meaning a person would have to prove they had mental capacity.

Another change which could be voted on is clarifying that a person would not be eligible for an assisted death because they felt they were a burden on others or on public services.

Some changes MPs could agree without a vote today include requiring the government to publish an assessment of palliative care within a year of the bill becoming law, and that someone could not be considered terminally ill under the bill because they have voluntarily stopped eating and drinking.

Image source, PA Media

Paralympian and House of Lords crossbencher Baroness Grey-Thompson is a vocal critic.

She is worried that disabled and other vulnerable people could be put under pressure to end their lives - and that doctors may struggle to make accurate six-month diagnoses.

Actor and disability-rights activist Liz Carr, who made the BBC One documentary Better Off Dead?, also opposes the legislation.

"Some of us have very real fears based on our lived experience and based on what has happened in other countries where it's legal," she wrote on X.

Dr Gordon Macdonald, from campaign group Care Not Killing, said the bill ignores the wider "deep-seated problems in the UK's broken and patchy palliative care system".

Oscar Bentley
Political reporter

MPs have made various changes to the assisted dying bill since they first voted on it in November.

The main one has been the replacement of the role of a High Court judge in signing off an application for an assisted death with a panel of experts.

The panel would contain a senior lawyer, a psychiatrist, and a social worker. Supporters of the bill argue it makes the process stronger by adding “extra expertise”. The change was made after MPs heard evidence there was a lack of court capacity to deal with assisted death applications.

MPs have also passed amendments that would ban healthcare professionals from raising assisted dying with under 18s (under 18s were already unable to access an assisted death in the original bill), banning the advertising of assisted dying, and preventing the automatic investigation of an assisted death to a coroner.

The original bill said doctors wouldn’t be obligated to take part in an assisted death. But another change made to the bill has expanded this to all healthcare professionals, for example social care workers or pharmacists.

It is normal for bills to undergo some change during the legislative process. This is part of the scrutiny given to draft laws by MPs.