A Dorset businessman has told of how he was held without trial for four months in Hungary as he is forced to return to the country.

Michael Turner must go back to the country next week to answer allegations over a failed timeshare company in 2005.

The businessman, 29, described yesterday how, when he was first extradited on November 2, 2009, he was led through a busy airport in handcuffs on a dog-style lead and imprisoned for four months at the notorious Budapest Penitentiary Institute, where he was kept in his cell for 23 hours a day.

Unable to speak the language, and with no warm clothes, he was only allowed on to a caged roof terrace in temperatures of minus 20C for an hour a day and was only allowed one shower a week, he said.

He was released, with no explanation, on February 26, 2010 – having only been interviewed once by police – and returned to Britain.

He appeared before the Commons Home Affairs Select Committee yesterday, when he called for judges to be given more power to test the evidence in cases before Britons are extradited under the European Arrest Warrant.

His comments came as Keith Vaz, chairman of the committee, said he would call Hungary’s Ambassador to the UK Janos Csak to answer questions before MPs after hearing how Mr Turner, from Corfe Castle, has been treated.

Mr Vaz said he wanted answers from the Hungarian authorities.

“I will write to the Hungarian government to express our deep dissatisfaction about the way in which you have been treated,” he told Mr Turner.

“We find this to be thoroughly unsatisfactory. We don’t believe this is the way the warrant actually should work, where people should be extradited and there should be a fishing expedition to find out what’s gone wrong. I will write to the Hungarian ambassador to ask him to come before the committee to explain what has happened in this case, but also to look at these matters of principle.”

Asked how he would like to see the European Arrest Warrant reformed, Mr Turner said: “Personally, I’d say definitely look into the evidence. I’ve now got to see the evidence of my case and I think there’s evidence in there to squash the European Arrest Warrant. I don’t know who looked at the evidence to make up the warrant but it’s obviously not true. I’d like the court system to have more power to look into them.”

The timeshare company run by Mr Turner and Jason McGoldrick, 39, from Plymouth, collapsed in 2005. Hungarian prosecutors used European Arrest Warrants to detain them. Both men deny wrongdoing.