“Inexcusable” failures in the UK’s system for dealing with modern slavery are leaving victims reduced to destitution while their abusers go free because they are not adequately supported to testify against them, an alarming report has warned.

Thousands of victims have not come forward, while others who have chosen to give evidence against their enslavers have ended up destitute as a result of insufficient support, according to a report published today by the Work and Pensions Committee.

It is estimated there are between 10,000 and 13,000 victims of modern slavery in the UK, but the report warns that failings in the current mechanism mean that once they are identified, they have no automatic formal immigration status or rights.

Weak and uncoordinated frontline support means victims are often faced with a total lack of understanding or even recognition of their situation, which in turn has a negative impact on the number of successful prosecutions of slave masters, according to the findings.

One, Client M, told the Committee he managed to escape from his traffickers, but it took four years before someone recognised that he was a potential victim of modern slavery. According to the report, his adviser in the Jobcentre, who knew his story, did not pick up on his situation, and it took four years before someone finally offered him the help he required.

The report also found that no data is collected on victims once they leave the National Referral Mechanism (NRM) – the UK’s framework for identifying victims of human trafficking and ensuring they receive protection and support – and that the recording of data that is collected was “generally substandard”.

The Committee said it was “unacceptable” that the Government did not monitor the re-trafficking of victims and urged that reform to the NRM must include the recording of instances where victims have been processed through the framework more than once.

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As part of the inquiry, Baroness Butler-Sloss, Trustee of the Human Trafficking Foundation who helped draft the modern slavery bill in 2014, said the outcome of the NRM process was “nothing but a piece of paper” to victims.

“It is an extremely unattractive anomaly and an extremely expensive process putting a person through the NRM to get a positive outcome that everybody accepts that person is the victim of an appalling crime,” she added.

“At that stage, having spent all that money, having gone through all that process, there is no result except a piece of paper.”

Problems surrounding asylum rights were also noted in the report, in its findings that being a victim of slavery through the NRM confers no equivalent right to remain for any period, while recognition as a refugee grants an initial period of five years’ leave to remain in the UK.

The damning findings come less than a year after Theresa May announced on entering Downing Street that Britain would lead the fight against modern slavery, calling it “the greatest human rights issue of our time”, and pledging a £33m boost to coordinating the Government response to the issue.

The inquiry, launched at the request of the UK’s Independent Anti-Slavery Commissioner after he wrote to the Committee expressing his concerns that the support for victims of modern slavery was “inadequate”, made a number of urgent recommendations.

It suggested that all confirmed victims of modern slavery should be given at least one year’s leave to remain with a personal plan for their recovery, which it said should act as a “social passport” to support for at least the 12-month period of leave to remain.

Training on how to spot signs of slavery and deal sensitively with identified victims should be greatly improved among frontline Department for Work and Pensions (DWP) staff, who are often not aware of modern slavery, the Committee said.

The report also urged that the Government must undertake an urgent review of the benefit support available to victims, including those who are assisting the police with investigations.

Kate Roberts, head of office at the Human Trafficking Foundation, welcomed the findings and said changes were “much needed” in a system that currently leaves victims of modern slavery without support and unable to unpack the trauma they’ve been subjected to.

“It’s good to see such a detailed report that really shines a light on what happens to victims after the identification of modern slavery. I really welcome the recommendations – they are much needed," Ms Roberts told The Independent.

"At the moment the 'recovery period' is actually the period during which it is being decided whether they are victims or not. I don't see how it is a recovery period. If there's so much uncertainty in your life and you've come from this extreme trauma, I don't think you can really begin to unpack that trauma and recover when you've got all the uncertainty around the corner.

Independent Appeal: Modern face of slavery Show all 2 1 /2 Independent Appeal: Modern face of slavery Independent Appeal: Modern face of slavery Meena Tirki, 17, left her village with the promise of a new life in East Delhi, but was soon being abused SIMON DE TREY-WHITE Independent Appeal: Modern face of slavery British VSO worker Serena O'Sullivan with victims of domestic abuse Sushma Kumari, 24, right, and Meena SIMON DE TREY-WHITE

“Until now, our whole system has just focused on the identification of victims. They go through this really quite traumatic process of having to disclose what’s happened to them and almost relive it, and then the decision is made that they are a victim and it doesn’t really make a difference. They think now they’'ll be okay because the Government believes them, but in fact it often doesn’t mean anything.

“If these recommendations were implemented it really would change that. Many victims will take longer than a year to recover, but at least they would have time to get relevant advice and put the necessary applications in.”

In light of the findings, chair of the Committee Frank Field MP said: “While we applaud the leading role the UK has taken in tackling this ‘barbaric crime’, as the Prime Minister has called it, when you consider what is at stake, there is a shocking lack of awareness and co-ordination in the frontline services dealing with modern slavery.

“What these people go through is unimaginable, and yet it is happening, here and now, and our response seems almost lackadaisical: a paper exercise earning you recognition as having been enslaved, which then entitles you to almost nothing as far as we can see.

“We don’t even record instances where the same person is thrown back into this hell, even though that is surely the clearest sign of the failures in our response. No society worth its salt can allow this to continue, or fail to support those who fall victim.”

Mr Field urged the Prime Minister to go further in the Modern Slavery Act she brought in as Home Secretary in 2015, by conducting an urgent review and putting in place some “basic minimum safeguards” in order to support victims.

“The Prime Minister now needs to open up a further front in her Modern Slavery Act,” he said.