According to new research carried out by Post Office Travel Services, over a third of people working in the UK failed to take their full holiday entitlement last year.
When asked why, nearly half (49 per cent) of people said it was because they had too much work to do and couldn't get away.
A further one in five stated that other people taking time off meant they were not able to and 15 per cent said it was because they could not afford to go away.
The research also showed that men in their late thirties/early forties are the worst for not using their holiday entitlement and are 40 per cent less likely than women to take their full allowance.
The Post Office Head of Travel, Kevin McAdam said: "In addition to getting the time off, we know that many people find preparing for a holiday a stressful process what with shopping, changing money and getting insurance.
"That's exactly why we try to make the getting 'holiday ready' experience as hassle-free as possible. We hope that by offering a local, one-stop shop for travel services means less time spent preparing for your holiday and more time simply enjoying it."
People working in the energy and mining industries are the least likely to take holiday - over 60 per cent fail to take their full entitlement.
Workers in construction and electronics came a close second with 54 per cent. In contrast, people working in the health services were the most likely to take their holiday - only 26 per cent failed to take their full allowance last year.
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