One of the country’s most notorious websites advertising sex for sale has seen the number of prostitutes it offers increase by 50% in the space of just three years.

Almost half of the known attempts to access banned websites on the Oireachtas server occurred when the Dáil and Seanad were not sitting.

What politicians access on their computers in Leinster House is protected under confidentiality rules.

Leinster House workers have been disciplined over bids to log on to illegal or banned websites — but Oireachtas officials have refused to provided any details.

Massage parlours offering topless treatments but no additional sexual services are springing up across Cork.