Camping Uk

I watched this TV Drama/Film about 3/4 years ago. The plot was a bit controversial now because of Maddie going missing.
Cannot find it on Movie Database or anywhere on the net its totally vanished!!!

Plot:

It was about several families going on a camping trip to France, the the husband of one of the family’s motive to go on holiday was to save his marriage.
The family son/daughter goes missing after they befriend another couple who have a camper van and a child (male) - I thought the guy with the camper van was Michael Brent but he doesn’t have the film under his credit.
They travel up and down the countryside looking for their child, and another child who was also abducted but not their child is run over and killed in the middle of the night.
The older children get trapped in the camper van and eventually it turns out to be the guy and his wife in the camper van who has taken their child.

For the life of me I cannot think of the name of the film/TV Drama and why its no longer on the internet.

Can anyone remember who the actors were and what the name of it was?? I tried endless times to work it out, see if you are any better!!