“She is dead and I don’t know why and nor does anyone else. People always look for blame and answers but sometimes there is no one to blame and some questions can never be answered.”

Rosemary’s brother Robert, 17, said: “She had a fantastically good 15 years of life and will be missed by all, especially her friends and family.

“We don’t know what could have happened in Rosemary’s life to lead her to the circumstances that have occurred. But I know deep down that she knew that so many people loved her.” Keen horserider Rosemary, who also had an older sister and gained an A-grade in GCSE maths, disappeared three weeks ago after fleeing to her bedroom in a tantrum. 

Her parents had refused to allow her go horseriding after discovering she lied about being sacked from a part-time job.

There was a huge air, land and sea search and her father’s employer offered a £100,000 reward for information.

Computer programmer Mr Edwards said: “We now know from the internet trail on her computer and from text messages on her phone that she was going through some kind of torment in her head.

“But at the same time she was her usual jolly self when around family and friends.

“The last time I saw Rosemary was at 10.30pm on Tuesday, September 4, when I said goodnight and asked her for a hug. She refused but I gave her a kiss on the cheek. 

“I wish I’d said how much I loved her. But how many parents do this just in case it could be the last time you see your daughter?”