ONE punch can turn you into a killer, police warn ahead of alcohol-fuelled celebrations.

The stark message comes as thousands of people in Swindon prepare to mark Christmas in the traditional way: by drinking until you can't stand up.

A spokesman for Wiltshire Police said: “We know a lot of you will be heading out for festive drinks tonight. Most importantly, we want you to enjoy yourself and see in the big day in the best way possible.

“Please drink responsibly and plan your journey home. It's also important to remember that Christmas isn't an easy or happy time for everyone, so avoid any situations where tensions are likely to be running high.

“Remember - one punch can kill. Don't let a split second of anger turn you into a killer.”