Sean Quinn Sr, once Ireland's richest man, has described his nine-week spell in Dublin's Mountjoy Prison as "tough".

The former billionaire was released on Thursday after serving his full term.

He said the most difficult part of the sentence was being confined to his cell for up to 12 hours a night but said he had tried to "fit in" to jail life.

His family are involved in a bitter legal dispute with the former Anglo Irish Bank and Mr Quinn said it was possible he could be jailed again.

He spoke to BBC Newsline's district journalist Julian Fowler about the experience of being behind bars.