An increase in the number of workers doing unpaid overtime in the public sector has almost entirely been driven by 250,000 more women working extra hours for free, according to a study by the TUC.
In 2003, more men than women did unpaid overtime in the public sector, but the position has been reversed, the research found.
One in four public sector workers puts in at least an extra hour a week, the TUC said.
Around one in six staff in private firms worked extra hours for no pay, a figure which has largely remained unchanged over the past decade, although the amount of unpaid overtime has increased.
More top news
A truck loaded with sand collided with a school bus carrying children aged between three and 12 years old in Uttar Pradesh.
BA said the strikes will impact "only 1 per cent of our total scheduled flights across the three days."
It's another mild day in the north and west, but cold in the south and central England.