Mark Bellis is the Director of Policy Research and Development for Public Health Wales. As police across the country prepare to crack down on drink-driving this Christmas, he urges people: "Moderate your alcohol intake - and remember your Christmas for good reasons, not bad ones."
Relatives of 21-year-old Kieran Lea Arnold, who was killed by a drink-driver in June, have worked with North Wales Police to produce this campaign video ahead of Christmas.
Deputy Chief Constable Gareth Pritchard said: “To lose a child must be one of the hardest things a parent can face and I would like to thank Kieran’s family for assisting us with this year’s campaign.
"Please don’t drink and drive. Think about the consequences. You could face losing your licence and your job, face imprisonment and, much worse, have to live with the guilt of taking a life for the rest of yours. Don’t take the risk.”
Thousands of motorists face being stopped over the next few weeks as teams from all four Welsh forces conduct roadside checks across the country.
During Christmas last year, 500 people in Wales were caught driving over the legal limit and over 35,400 breath tests were carried out.
The North Wales campaign is being supported by the family of Kieran Lea Arnold, from Cymau, near Wrexham, who was killed by a drunk driver in June this year.
Kieran's family have spoken of the pain of losing their 'popular, gentle giant' to a drunk driver, and have helped put together a short film on the effects of getting behind the wheel when over the limit.