EMPLOYEES working unpaid extra hours can now send their manager an anonymous message, suggesting that he or she should show some gratitude for their overtime.

This Friday is "Work Your Proper Hours" day and workers can log on to the TUC's website www.workyour properhoursday.com to submit their manager's e-mail address.

On the morning of Friday 25 February their boss will be sent a message that suggests managers say thank you to their staff for their hard work and commitment, and maybe even buy them an after work drink after leaving work at the proper time for once.

If it's any consolation, managers do even more hours. Official statistics show an average boss clocks up nearly nine hours extra a week - worth nearly £9,000 a year.

"The bossagram is a fun way to make a serious point," said TUC general secretary Brendan Barber.

"Too many workplaces are in the grip of a long hours culture, and with a bit better organisation people could gain extra hours of free time and still get their work done."