Anyone who's ever felt guilty after shuffling into work with a hangover can take some solace from research that suggests as many as one in 10 members of the workforce are regularly heading to the office feeling worse for wear.
Drinkaware has warned that each day more than 520,000 people in the UK go to work feeling hung over.
The alcohol charity surveyed more than 1,000 adults and found that almost one in 10 people go to work suffering from the effects of too much alcohol at least twice a week. Drinkaware has warned hangovers in the workplace are likely to become more prevalent during the World Cup.
The chief executive of Drinkaware, Chris Sorek, said turning up to work suffering from a headache and/or nausea caused by drinking could negatively impact performance.
"With hundreds of thousands of people going to work every day after a heavy night, it impacts work productivity and even results in employees going home sick," he warned.
"An international sporting event like the World Cup will inevitably capture the attention of the nation and is a great time for people to come together, but hangovers at work are likely to increase."
The charity's survey revealed that the average person goes to work bleary-eyed three times a month. Of those who are hung over at work, almost one in five admit struggling to keep on top of their workload and to making mistakes, and some 7% have had to leave early due to the resulting illness. While Drinkaware's survey suggests there may be half a million people quietly steaming in workplaces across UK, that figure could be higher if the charity's advice on alcohol consumption is taken as the benchmark for overindulgence.