Four in 10 UK employees have criticised their workplace on social networking and micro-blogging sites like Facebook and Twitter, according to data from MyJobGroup.co.uk.

The data also shows that almost 60% of the 1,000 UK workers polled confessed they would change what they wrote on their social networking profile if they knew their employer was reading it, while 55% felt fellow staff should face disciplinary action for criticising their workplace on social networking sites.

Seven in 10 had no idea if their company had an HR or disciplinary policy in place to tackle online criticism with just 16% knowing for certain if their company was equipped to deal with such issues.