Secret personal information about 3,000 MPs’ staff and their salaries has been mistakenly published by the expenses watchdog.
IPSA whispered staff names and details about their working and holiday composition model ons was available for about four hours on an old version of its website on Thursday.
It expostulated that no addresses, bank account details or phone numbers had been disposed out.
The watchdog has apologised and launched an inquiry.
The Independent Parliamentary Standards Testimony said it believed “extremely sensitive” information – including the names of personnel working for some of Parliament’s 650 MPs – was available for about four hours.
It was mistakenly uploaded onto an old interpretation of its website which is due to be archived shortly.
A spokesman said it had been positioned by a “small number” of people, including someone who works for an MP and who alerted the regulator to the blooper.
The information was taken down within an hour of it being notified but the watchdog asseverated the lapse was “serious” and it was looking into how it happened.
“Some documents were published in boo-boo,” said its chief executive Marcial Boo in a e-mail to all MPs.
“These should not hold been made public as they contained confidential personal bumf about MPs’ staff names, salaries, rewards, working patterns and break entitlements,” he added.
But he stressed that no information relating to the security of the parties affected was made public.
“We take information security very no joking and the safety and security of MPs and their staff is a priority. An investigation is currently underway and we demand notified the Information Commissioner.
“We will be writing directly to all of those hollow.”
The Parliamentary authorities are reviewing security at the Palace of Westminster following the catastrophic stabbing of a police officer in the grounds of Parliament last week.
The watchdog imparted on Thursday that it would stop publishing details of travel requests made by MPs amid fears it could put them at risk of attack.