Parliamentary computers have been used to access gay cruising and hardcore pornography websites thousands of times over a 14 month period.
The Mail on Sunday revealed gay cruising websites were accessed 3,459 times on computers used by members of parliament, peers and staff between May 2011 and July 2012.
On May 2011, a gay dating website was accessed 2,878 alone.
Pornography accessed by parliamentary computers include sadomasochism, foot and fat fetishism, and a website featuring naked women lying next to cats.