Alison Linforth, a "bubbly and happy" 16-year-old, had complained of slight chest pains, but these had been passed off as indigestion.

The teenager was sitting at her desk on her first day as an A-level student last September when she suddenly fell unconscious.

Staff at Cadbury Sixth Form College in Kings Norton, Birmingham, tried to revive her, but failed.

Her parents, John and Evelyn, were stunned.  They had lost another daughter, Amanda, at eight weeks old to cot death in 1986.  Then three years later, another child, Zoe, was stillborn.

Alison had hardly sat down before she collapsed in the college, so there was no question of horseplay or fooling around.  Teachers thought she had a fainting fit and acted appropriately.

Agony as third daughter falls victim to mystery sudden death - Daily Mail - 4th March 2004