LONDON - British lawmakers will vote on Friday on whether to proceed with a bill to legalize assisted dying for terminally ill people, in what would be the biggest social reform in the country for a generation.

Last November, lawmakers voted 330 to 275 in favor of the principle of allowing assisted dying, paving the way for Britain to follow Australia, Canada and other countries, as well as some US states.

Now, after months of scrutiny, amendment and emotional debate, the bill must clear another stage of voting to keep it on the road to legalization, a process that could still take months. A vote against would stop it in its tracks.

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The Labour lawmaker who has proposed the new law, Kim Leadbeater, said there could be a reduction in the number of members of parliament who support the bill on Friday, but she was confident it would still be approved.

One member of parliament who supports the legislation said there were about a dozen votes between those in favor and against, with a number yet to declare their position.

Dozens of lawmakers earlier in June signed a letter to the leader of the House of Commons saying that there had not been enough time to debate the details of such a consequential law change.

Leadbeater said her biggest fear was that if the legislation was voted down, then it could be another decade before the issue returns to parliament.

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The issue was last considered in 2015 when lawmakers voted against it.

"It works and it is safe, and it provides dignity to terminally ill people," she told reporters before the vote.

"This is not an either or when it comes to palliative care or assisted dying. It is about choice for people."

Public support Opinion polls show that a majority of Britons back assisted dying, and supporters say the law needs to catch up with public opinion.

But, since the initial vote, some lawmakers say they are worried the bill's protections against the coercion of vulnerable people have been weakened.

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Under the proposed law, mentally competent, terminally ill adults in England and Wales with six months or fewer to live would be given the right to end their lives with medical help.

In the original plan, an assisted death would have required court approval. That has been replaced by a requirement for a judgement by a panel including a social worker, a senior legal figure and a psychiatrist.

Lawmakers have also raised questions about the impact of assisted dying on the finances and resources of Britain's state-run National Health Service and the need to improve palliative care.

Prime Minister Keir Starmer's Labour government is neutral on the bill, meaning politicians can vote according to their conscience rather than along party lines.

Lawmakers will hold a final debate on the legislation on Friday morning before a likely vote in the afternoon. If it passes, the legislation will be sent to the House of Lords, parliament's upper chamber, for further scrutiny.