'Serious data breach' as expenses watchdog publishes details about MPs' staff

The watchdog responsible for MPs' pay and expenses is investigating a "serious data breach" after a document containing confidential details about MPs' staff was wrongly posted online.

The Independent Parliamentary Standards Authority (Ipsa) said the document was uploaded in error on an old website on Thursday night.

It included confidential personal information about MPs' staff names, salaries, rewards, working patterns and holiday entitlements.