Inspector Wexford - Murder Being Once Done

From the VHS Cover:

A chilling murder investigation begins when a young girl's body is found hidden in a vault in a gloomy London cemetery.
Loveday Morgan was strangled with a silk scarf. The only clues in her handbag were a photo and two telephone numbers.
Wexford, convalescing in London, finds himself irresistibly drawn to the case.
His unofficial investigation delves into the lives of those involved to reveal a moving story about adoption and the intense love of parents for their children.