A Kent University lecturer has spoken of his relief after being released from a Brazilian prison.

Martin Boyle, 45, was arrested last month over alleged non-payment of child support shortly after arriving in the country.

He had been trying to visit his 16 year-old daughter.

Mr Boyle, who is director of the International Foundation Programme, based at Keynes College, was released on Friday evening local time after a successful legal challenge by his lawyer.

He told the BBC his release had happened "very quickly" but that he was "very relieved."

Mr Boyle, who is divorced from his Brazilian wife, was arrested on July 25 when he arrived at Guarulhos International Airport on the outskirts of Sao Paulo.

Brazilian authorities held him over £4,000 in unpaid child support but claimed he could owe up to £28,000.

He says has not seen his daughter since 2001.

"I am very relieved - it all happened very quickly," Mr Boyle told the BBC on Friday night shortly after his release.

He said his release came after a senior police officer entered the jail and asked for the "English guy".

When the officer freed him everyone jumped up, cheered and clapped.

Conditions in the prison were harsh, he said, with up to 22 inmates sharing a cell.

Mr Boyle slept on the floor, and shared the space with hardened criminals.

He remains with friends in Sao Paulo and still hopes to see his daughter.

The lecturer plans to return to the UK next month.