Three million people over the age of 65 are not looking forward to Christmas this year, with more than half a million admitting it was because they will spend the festive period alone.
The research, undertaken by Age UK, found that feelings of loneliness are prevalent among a large section of people of pension age in the UK.
More than a quarter of those who are dreading the the forthcoming festivities said that it was because it would bring back memories of a friend or loved one who has now passed away.
Over a fifth of those polled, more than 2.1 million people, are worried about not being able to leave the house over Christmas, either because of their mobility or as a result of poor weather conditions.
Michelle Mitchell, director general of Age UK, said: "Living in isolation and loneliness is a stark reality for too many people in later life."
She encouraged people to check on those in the community that may be vulnerable over Christmas.
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