A Fianna Fail TD has been caught on microphone using the F-word in the Dáil.

A microphone caught Robert Troy describing one situation as "F-ing desperate".

Ironically Deputy Troy was chairing the debate at the time - meaning he is responsible for upholding discipline in the chamber.

His Fianna Fail colleague Willie O'Dea was speaking on social welfare issues when the quiet remark was picked up on mic: