A mother today called for a fresh investigation into the sudden death of her daughter after new evidence confirmed she was killed by a ringing alarm clock. 

Nurse Lisa Jane Browne, 27, suffered from an undiagnosed heart abnormality which caused her heart to stop after the shock of her 6am alarm call on January 12, 1998. 

Earlier this month scientists in Sweden confirmed the paediatric nurse had the rare disorder Long QT Syndrome. 

The condition affects the electrical system of the heart, which can cause unexplained death in young people. 

Her mother Doreen Harley, of Connah’s Quay in North Wales, wants the inquest into her death to be reopened and her cause of death changed. 

She said: “I could never accept that Lisa died for no reason and now I have proof that it was Long QT Syndrome that killed her. 

"It is vitally important that this is officially recognised and the only way to do that is to reopen the inquest and change the cause of death on Lisa’s death certificate."

Mrs Harley is campaigning with the charity Cardiac Risk in the Young for all people aged between 14 to 35 to be offered free Long QT screening. 

She said: “No more young people should die so needlessly when this disorder can be diagnosed and treated.”