SIR – We are pleased to see that the Health Protection Agency’s Advisory Group on Non-ionising Radiation (AGNIR) report concludes that there is no convincing evidence that exposure to mobile phones has harmful health effects.

Over the years, the conclusion of most scientific bodies, including the Institution of Engineering and Technology’s (IET) Biological Effects Policy Advisory Group, has remained substantially the same – that there is no strong evidence that normal exposure to low-level radio frequency electromagnetic fields has harmful health effects.

The absence of robust evidence of harmful health effects is reassuring and is consistent with findings over the last 20 years.

Dr Tony Whitehead, director of policy, Institution of Engineering and Technology, Savoy Place, London