The grieving family who live in fear that even a phone's ring could bring instant death

Heartbroken Margaret Banks has been warned to throw away her alarm clock after her grandson was killed by the ringing of his mobile phone. Ryan Hulme, 19, collapsed and died from shock when he got a call as he used his PlayStation at home.

Last week an inquest that Ryan, suffered from Sudden Adult Death Syndrome (SADS), which can be triggered by any loud and unexpected noise. Doctors had failed to discover the condition because test results were read incorrectly. And it was revealed that the genetic disorder may also have killed his mother, who died suddenly when she was just 20 and Ryan was only five weeks old.

He was brought up by his grandmother Margaret, but now doctors have warned her not to use an alarm clock, because tests have revealed that she, too, is susceptible to SADS. Last night Mrs Banks, 59, of Fenton, Stoke-on-Trent, Staffs, said: