An Garda Síochána is going through what is thought to be its biggest ever management clear-out with around a fifth of its senior officers leaving this year.

An Garda Síochána is going through what is thought to be the biggest clear-out of senior officers in its history.

More than 50 people were arrested yesterday in a day-long swoop by over 140 gardaí aimed at crimes such as drug-dealing, forgery and burglary.