Steve Moxon is to release a book about his claims

Immigration whistleblower Steve Moxon is to take the government to a tribunal after confirming he had been sacked.

Mr Moxon was suspended in March after revelations that Immigration Service staff in Sheffield had been asked to "fast track" migrants' applications.

The Home Office confirmed: "He has been informed...that he has been dismissed."

The Sheffield-based civil servant said: "They haven't got a case. I shall be going to an employment tribunal and I have been advised I will win."

Mr Moxon, 48, said he heard he had been sacked last Monday.

His dismissal comes after he publicly claimed checks were waived in the cases of migrants from eight eastern European countries that joined the EU in May.

Immigration Minister Beverley Hughes resigned in April - a month after Mr Moxon's allegations were made public.

An internal inquiry concluded that local officials were trying to clear backlogs and ministers did not know about their decisions.

'Not silenced'

Mr Moxon revealed he is to release a book, The Great Immigration Scandal, later this month.

He said: "They will not silence me. My book goes into more detail, there is a lot more to come out."

The Home Office said ministers were not involved in the decision to dismiss him.

A spokesman said: "He has been informed in writing that he has been dismissed and the reasons.

"The normal Home Office internal disciplinary proceedings were followed.

"It is an internal civil service disciplinary matter and not a matter ministers would be involved in."

Mr Moxon justified turning to the press by describing what he deemed to be "a complete and total breakdown of the immigration service".

In April he was forced to justify his actions before a Home Office human resources boss.

The hearing gave him a chance to respond to a Home Office report on his behaviour.

Mr Moxon said the Home Office report concluded he had acted reasonably but his revelations had not been covered by the Public Interest Disclosure Act - which he claimed is completely incorrect.

The Act allows workers to expose wrongdoing at work.