The average person will consume around 6,000 calories through food and drink on Christmas day, according to new research.

The expert team at the Weight Management Service in Glasgow have estimated that because of this, the average person can expect to gain five pounds over the festive season, reports the Herald.

For this reason, the team have devised a number of ways for people to handle tricky Christmas situations where people are constantly trying to fill your wine glass or offer you another mince pie.

Dr Susan Boyle, a consultant clinical psychologist with the team, said the key to maintaining healthy eating through the Christmas and New Year period was preparation.

She said: "Don't wait until you are surrounded by temptation at a rowdy party. Work out some assertive comments now to stop food or drink being pressed on you by well-meaning friends. Remember, you have every right to refuse.

"The scratched-record technique is very effective. Repeat a polite phrase such as: 'that looks lovely, but no thanks,' or: 'I have a drink already, thanks,' every time someone persists. They will get the message."

Nathalie Saiman, a dietician at the Weight Management Service, said there was a particular danger in Christmas snacking.

She warned against grazing on food and snacks, as the number of calories would add up - by as much as 300 calories for a mince pie and 150 calories for a glass of wine. Instead, she advised people to stick to main meals and avoid unhealthy nibbles.