A crackdown on drink and drug-drivers has been launched by Thames Valley Police ahead of the festive season.

Thames Valley Police said 'irresponsible and dangerous' drink and drug drivers will be targeted during its seasonal campaign to protect road users - Operation Holly - in a bid to reduce crashes.

Until January 1, 2020, officers will be carrying out breath tests, drug tests and field impairment tests, working to deter any motorists thinking about driving while impaired by the effects of alcohol or drugs.

On average, 20 per cent of all fatal collisions involve an impairment from drink or drugs, the force said. In Hampshire and Thames Valley, around 400 drink drivers are caught a month.

The public are encouraged to report drink and drug drivers with as much information and detail as possible so they can be targeted.

If you know someone who drink or drug drives you can report them online or by calling 101. Alternatively if you wish to remain anonymous, you can contact the independent charity Crimestoppers on 0800 555 111.

If there is an immediate risk to the public always call 999.

Sergeant Scott Kerr said: “Every year officers deal with cases of drink or drug driving that directly result in families facing Christmas without loved ones.

"Even the smallest amount of alcohol or drugs in your system can affect your ability to drive safely.

“Friends, colleagues and family members can positively influence those around them. So we are calling on them to stop potential drink or drug drivers from getting behind the wheel and risking tragedy this Christmas.

“We’ll be running targeted operations across the region to enforce the law on drink and drug driving: you can face a fine of up to £5000, disqualification from driving, and a lengthy prison sentence. If you know someone who drink or drug drives you can help by reporting them on 101 or call 999 if they are driving or immediately about to drive under the influence.

“I am urging people to plan ahead during the festive season, to think about how you’re going to get home, and don’t forget about the impact alcohol and drugs can still have the morning after’.

“Our message is simple: Don’t drink or drug drive – It’s not worth the risk.”