It’s been reported that holidaymakers who take to the slopes after one too many could be in danger of invalidating their travel insurance. A recent study conducted by the Post Office questioned 1,000 skiers about their drinking habits while on a winter sports holiday. They found that 22% admitted to drinking heavily while on a winter snow holiday, and 39% admitted to hitting the slopes the day after a heavy session with a hangover. Brits abroad on winter ski holidays drink 10 units of alcohol on an average during an evening out, the survey found. Because one unit of alcohol takes approximately 1 hour to burn off, many skiers and snowboarders could still be affected by the alcohol when they take to the slopes the following day. According to one insurance company, if a medical professional deems alcohol is a significant factor in an accident on the slopes, this could invalidate your travel insurance. If alcohol is considered to have been a cause in a winter sports holiday, you could be left to pick up the full cost of your medical expenses. However two thirds of those questioned said they were unaware that excessive drinking can invalidate a travel insurance policy if it’s considered a factor in the accident.