Ian, of Birchgrove, Cardiff, said at the time: “My ear would be red when I left work at the end of the day. I didn’t think what it was doing to my brain.
“I spent my working life on my mobile – I would have two-hour conference calls some days.”
“I knew straight away it was due to my excessive use of my Blackberry – I was on it all the time.
“I did a lot of research and the number of brain tumors is going up.
“I’m really concerned about children using mobiles – their skulls are softer and radiation from these devices can reach their brains more easily.”
Research carried out at the University Bordeaux in France discovered an increased risk of brain tumors in people who use their mobiles for more than 15 hours a month. Ian invested in a gold colored hand receiver to encourage others to stop holding their mobiles to their ears.
A year ago he said: “I need to get the message across that mobile phones can be dangerous.
“I used mine too much, I know that – but people need to be made aware of the risks and start switching to hand-held receivers. It could save lives.”