I remember watching it with my mum was I was a preteen (Early 2000's) I think (totally should have been in bed but heyho!) I will try to give as much information as possible.
The main actress was a blonde, skinny lady with long hair. She had a daughter (who was also blonde) and I think the daughter is found murdered/possibly drowned. I remember there were flashbacks of the kid in the back of the car playing with a stuffed rabbit toy. The car is filled with sunlight and she was also playing with a red scarf that was dancing in the wind.
I also think that the mother had flashbacks possibly of a butchered rabbit (related to her daughter having this stuffed rabbit toy) Does anyone have any idea what this drama was called? I vividly remember the sunlight in the car and want to rewatch it as an adult as that scene seems to have stuck in my head for so many years...