British Governmnent claims that hands-free mobile phone kits are safe were thrown into doubt by research which showed that they can increase radiation to the skull by more than three times. The research from the Consumers' Association (CA) cocluded that hands-free kit users should not rely on them to reduce radiation. In positions where the kits gave higher radiation readings, levels were between 46% and 259% more than when the phone was used without the kit. Between 8% and 97% of emissions were cut when a change in positions were cut when a change in position lowered radiation levels.