"I was really worried when I first heard about the proposed changes," Mr Smalley said.

"It took about 18 months after I applied [to receive] Pip. It was a difficult time and I got in to debt, which I have now cleared thanks to the benefit," he added.

Nick Howard, 51, from Cambridge, is neurodivergent and has been claiming Pip for five years.

"I currently work at a hospital four days a week," said Mr Howard.

"Without Pip I would not be able to work as it pays for my transport to and from my workplace.

"I'm currently buying an electric bike on credit, others I have had have been stolen or vandalised," he added.

Mr Howard said he has a review of his benefit about every two years.

"It was a nightmare for me to get Pip in the first place, because of my condition.

"It took well over a year to secure it, it really is hard to fill out form after form if you are neurodivergent.

"Without Pip, I could not afford to work, as simple as that - I can't use any public transport because of my mental health.

"Pip also helps pay for my private counselling sessions I need to simply operate on a daily basis," he added.

Mr Howard said he was very surprised by the reactions he got when he posted on social media about his experiences.

"A lot of people gave me support, but an awful lot of others told me they were in the same boat as me.

I am still very anxious about what these reforms could mean for me," he said.

Sandie Burns, the chief executive officer of Disability Peterborough, a charity that provides services to help people living with physical disabilities in Peterborough and surrounding areas, said the whole welfare reform debate has caused "high anxiety" for people.

"It's scary for people, it is such a negative thing when people are told 'the money we've given you, we're now taking it back', we have never seen anxiety like it," she said.

"Nobody is saying the government shouldn't reform the benefits system, but what they should do is consult in the first place and that is what they have failed to do," she added.

In a House of Commons statement on Monday, Work and Pensions Secretary Liz Kendall said: "Welfare reform is never easy, but it is essential because there is no route to equality or social justice based on greater benefit spending alone.

"Our plans are rooted in fairness for those who need support and for taxpayers.

"They are about ensuring the welfare state survives, so that there is always a safety net for those who need it and that it lasts for generations to come."