From IMDB:

From cold, rock-strewn moors to comfortable suburban estates, award-winning writer Ruth Rendell explores the dark fissures between friends and family members that motivate murder.

Acorn TV offers this series which includes:

Master of the Moor, Parts 1,2,3
Colin Firth as outdoors loving loner.

Vanity Dies Hard, Parts 1,2,3
Newly wed woman searches for her vanished friend.

Simisola, Parts 1,2,3
Daughter of Nigerian surgeon is missing.

The Secret House of Death, Parts 1,2
How exactly did the next door neighbor die?

A Case of Coincidence, Parts 1,2
Surgeon’s wife murdered in the fens.

Road Rage, Parts 1,2,3,4
Young German tourist goes missing.

The Lake of Darkness
Generous lottery winner.

Harm Done
Pedophile,abduction,missing daughter