The North Wales Police region covers an exceptionally wide area - nearly a third of Wales’ land, and the problems that arise are very diverse from area to area - from the cities in the East to the countryside of the West.

With in-car, custody and body cameras, a TV crew followed the Roads Policing Unit in their incredible day-to-day work.

Sgt Raymond Williams has been with the unit for 10 years and for him, making a difference is what motivates him in his job. He said: "If I get so much personal satisfaction from being able to make a difference to someone in the darkest time of their lives, that's worth a lot more than money in the bank."

For the first time ever, cameras will have complete and honest access to the work of North Wales Police as they work to keep communities safe in an area that ranges from secluded country lanes to the busy North Wales Expressway, the A55.

Filming for Y Llinell Las began over Christmas in 2019 and over the recent period of COVID-19, the team has followed all the guidelines, legislation and protocols the Welsh Government has set to ensure that the work continues in safe way.

The series also draws our attention to drink and drug driving, speed, violence against the Police and much more.

Y Llinell Las, Tuesday, 9pm S4C (English subtitles available)

On demand: S4C Clic, iPlayer and other platforms.