West London is home to some of the UK's biggest workaholics, new figures suggest.
Nearly half (45.3%) of employees in Kensington and Chelsea spend at least 45 hours a week at the grindstone - a higher proportion than anywhere else in the country.
Westminster workers are the country's next most dedicated, with 44% grafting for 45 hours or more per week.
That's according to the latest Annual Population Survey, produced by the Office for National Statistics, for which at least 450 people in each London borough were quizzed about their working patterns.
Staff in Brent are the biggest slackers, according to the statistics, with less than a quarter (22.4%) working 45 hours or more.
Men are more likely than women to work a nine-hour day or longer, according to the figures, which were analysed by Trinity Mirror's Data Unit.
In Kensington and Chelsea, 61.3% of male employees worked at least 45 hours a week, compared with a quarter of female workers in the borough.
The EU Working Time Directive prevents employees from working more than 48 hours per work, unless they choose to opt out.