The dying breaths of her teenage son will haunt a Teesside Mum forever.

An inquest still has still to be held on 14-year-old Anthony Iverson, who died in September last year at his Billingham home.

Heartbroken mum Pauline Hartley fears his death could remain a mystery forever and be diagnosed as Sudden Adult Death Syndrome SADS.

She now fears that whatever killed Anthony could strike down any of her other three children.

Today Mrs Hartley spoke of how he left his last dying breaths on her answer phone.  She was away for the weekend, and as she slept Anthony called her three times in the early morning.  His last call clicked on the answer phone and left three minutes of deep heavy breathing before he went silent.

His sister discovered her younger brother in the morning in bed still holding the telephone to his ear.  His time of death was given as 4.30am.

About four hours before his death Anthony told his friend his heart felt "heavy" and was beating fast.  He used an asthma inhaler which he hadn't needed for years.

Mrs Hartley said: "I don't think he knew he was dying but he must have been in pain and obviously knew something was wrong to call me at that time.

A year after his death, Mrs Hartley wrote to MP Frank Cook about the length of time she was waiting for an inquest.  Within a week a coroner's officer called to her house for more information.

"Anthony had been dead a year when they came out asking questions about his death and what happened on the day.  It was ridiculous" she said, "we told them about the answer phone message but they didn't listen to it".

Mrs Hartley and her children have all had electrocardiogram - ECG - examinations and so far all results have been negative.

"I want to be convinced that a thorough post mortem was carried out. We feel like we're living with a death sentence, not knowing what killed him, and if it can affect us."

Anthony a year 10 pupil at Northfield school was described as loving, caring and funny.

A coroners officer confirmed that a date had not yet been set for an inquest.

Mrs Hartley added: 2I can't get angry about Anthony dying and I have no-one to blame.  I am still grieving.

"We can't even start to move on until the inquest is over, but I will never accept it if I am not told what caused his death."