Only hours left of the appeal to help build on the momentum from the defeat of the assisted suicide Bill and make this victory last.
DONATE NOW
Select Page

Man who signed up to Dignitas after misdiagnosis of motor neurone disease speaks out against assisted suicide Bill

A man, who initiated the assisted suicide process by contacting an assisted suicide clinic after doctors misdiagnosed him with motor neurone disease, has shared the serious concerns he has about the Leadbeater assisted suicide Bill under which he believes he would have qualified for an assisted suicide.

Peter Sefton-Williams,71, a retired journalist and Marketing Manager, was told by his doctor  “there is no doubt whatsoever that you have Motor Neurone Disease and that you typically can live between one and a half to four or five years”, and was also told to “not make any plans past six months’ time”. As a result, Sefton-Williams was “absolutely terrified” and immediately began making plans to end his life at the Swiss assisted suicide clinic, Dignitas. He even scoped out a notorious suicide spot near where he lived in case his plans did not work out.

“The day after the diagnosis, I contacted Dignitas, because they said it would take six months to do the paperwork. So I thought, ‘I have to do this in a hurry’”, he said.

As his panic subsided, Sefton-Williams abandoned these plans, and he began to notice his symptoms were not becoming worse but were actually improving. After seeking the opinion of a third specialist, he was told “this is not Motor Neurone Disease, this is Multifocal Motor Neuropathy”.

“It’s very rare, it mimics the early stages of Motor Neurone Disease. But it’s a mild disease, nobody dies of it, and it’s largely curable”, he added.

Misdiagnosis was “the most traumatic experience imaginable”

Sefton-Williams is now speaking out against Kim Leadbeater’s assisted suicide Bill, which he is concerned could lead to unnecessary deaths in cases of misdiagnosis like his. He has outlined that he would have likely been granted an assisted suicide under the Leadbeater Bill, which requires the approval of two doctors, as he received his diagnosis from two of the country’s top specialists. “I could realistically have been permitted an assisted death while suffering from a mild, and hopefully curable, auto-immune disease”, he said.

“I backed off but other people, if it were available, I think it’s highly likely they would do it. I absolutely understand, and I think the people proposing it have good intentions. I personally think the complications of it are too great ever to introduce it”.

“But there seems to be an assumption that the doctors at least are certain about what disease you have”.

“Doctors are fallible. It’s no use saying they’re the kind of gold standard and will always get it right, because they don’t always get it right. As my case shows, I could have thought that was a way out and I would now be dead. Whereas, as far as I can tell, there’s very little wrong with me”, he said.

Analysis of the 201 UK residents with a neurological diagnosis who chose assisted suicide in Switzerland between 2005-2022 showed that 79 of them suffered from motor neurone disease.

Sefton-Williams told The Times these figures could be repeated if the Leadbeater Bill becomes law. “It is likely that, given the horrendous symptoms and certain outcome, this would be replicated in the UK if the [assisted suicide] Bill became law”.

He added “And if I had been insistent on end-of-life treatment, people would have said, ‘well, he wanted a dignified death. It was his choice to end his own life on his terms'”. 

“I would have killed myself and nobody would have known that in fact I wasn’t ill at all. It seems a key point in all of this”.

‘I could have thought that was a way out and I would now be dead’ 

Senior medics have shared concerns about the difficulties of accurately predicting the prognosis of an illness.   Baroness Finlay of Llandaff, a former professor of palliative medicine said “Predicting life expectancy is impossible… I have known people who live well and actively for years after they were thought to have no more than a few weeks to live”.

Professor Katherine Sleeman, a specialist in palliative care, told The Telegraph “It is not possible to accurately determine someone’s prognosis as a number of months, say six months or 12 months”.

“As a doctor, patients do ask me, ‘How long have I got left?’ and I would never say, ‘Six months or fewer.’ I might say, ‘Your prognosis is probably measured in months, or “long months”.’ That’s  as precise as I would be”.

According to recent data obtained by The Telegraph through a freedom of information request, a fifth of people claiming benefits who were thought to have six months left to live were still alive three years later. 

The figures are important because the Terminally Ill Adults (End of Life) Bill, voted through at Second Reading on Friday 29 November, applies to adults who are thought to have fewer than six months to live.

As Kim Leadbeater’s Terminally Ill Adults (End of Life) Bill proceeds through its next stage, and following the publication of the Telegraph data, Dr Matthew Doré, the honorary secretary of the Association for Palliative Medicine, warned of the dangers of putting too much faith in the six-month provision in the Leadbeater assisted suicide Bill. He said “Under assisted dying laws … lives would have been tragically cut short – and we would never have known”.

“Can we accept a reality where one in five people might miss three more Christmases with loved ones due to the inherent uncertainty of medical prognoses?”.

“This stark truth exposes the misconception that prognosis is a safeguard: in practice, it comes down to the doctor’s discretion. How can you trust a so-called ‘safeguard’ which consistently and dramatically fails in being safe?”.

Spokesperson for Right To Life UK, Catherine Robinson, said “Peter Sefton-Williams’ astonishing story of misdiagnosis should serve as a stark warning. It is a real-life example of why legalising assisted suicide would be so dangerous”. 

“If assisted suicide had been legal, he would probably be dead now. His is an entirely preventable death and cases like this are a sadly predictable consequence of this Bill. MPs must vote it down at Third Reading”.

Urgent appeal 
to save liveS

Help stop three major anti-life threats.

Only hours left of the appeal to build on the momentum from the defeat of the assisted suicide Bill and make this victory last.

Dear reader,

Thanks to the hard work and dedication of people like you across the UK, after a two-year battle, MPs voted by 286 to 270 to reject the Edwards assisted suicide Bill.

This followed the defeat of the McArthur assisted suicide Bill in Scotland by 69 to 57 in March this year.

Many commentators thought both Bills would become law.

If that had happened, this would have led to the deaths of many thousands of vulnerable people over the coming decades.

Because supporters like you acted, those Bills were stopped.

Because of you, many vulnerable lives have been saved.

A prominent pollster described the campaign against these major attempts to introduce assisted suicide, which brought together people from all walks of life across the UK, as one of the “most successful 21st Century UK social issue campaigns”. You helped make that possible.

WHY WE MUST NOT STOP HERE

What we have achieved together is extraordinary. But we must not rest on our laurels.

Dignity in Dying, a multi-million-pound pressure group, has made clear that it will keep campaigning to legalise assisted suicide. 

We cannot wait until another Bill is brought forward. We need to keep pressing for better care and strengthen the case against legalisation now.

WHAT COMES NEXT

The next phase of our Support Not Suicide campaign will operate across Parliament, media, online and in grassroots communities in every constituency across the United Kingdom.

Our focus now is to build on that momentum from the defeat of these assisted suicide Bills and make these victories last.

We want to build a United Kingdom where assisted suicide is seen as unnecessary – and where legalising it is seen as unthinkable.

The first part of that work is a sustained push for universal access to high-quality palliative, hospice and social care. No one should feel driven towards assisted suicide because they cannot get the care and support they need. 

We have already asked supporters to contact their MPs about improving care. With your help, we will keep that pressure on in every constituency, brief MPs and Peers on gaps in care, and make the case for better provision in the media.

The second part is building on these wins to ensure more MPs and more of the wider public understand the dangers of legalising assisted suicide. We will put evidence of those risks before MPs and Peers. We will work with mainstream journalists to bring the voices of people directly affected, doctors and other experts into the national conversation, and produce clear videos and articles that supporters can share online and in their communities.

Our network of 250,000 supporters covers every constituency in the UK. Thanks to people like you sharing our content, our posts and videos have been viewed more than 100 million times online in the last year. 

We want to utilise that massive reach for this next phase of the campaign.

WE CAN ONLY DO THIS WITH YOUR HELP

The two-year fight to stop these Bills drew heavily on our limited resources.

To replenish those resources and fund the next phase of the Support Not Suicide campaign, we aim to raise at least £199,250 by midnight this Sunday (4 October 2026).

We are, therefore, appealing to you to please give as generously as you can today.

Every donation, large or small, will make a crucial difference in protecting vulnerable lives. Plus, if you are a UK taxpayer, £1 becomes £1.25 with Gift Aid at no extra cost to you.

Will you donate now to help make these victories last and protect vulnerable lives?

Urgent appeal 
to save liveS

Help stop three major anti-life threats.

Only hours left of the appeal to build on the momentum from the defeat of the assisted suicide Bill and make this victory last.