Doctors in London are continuing to assess the condition of Mario Scaramella - a contact of the poisoned Russian ex-agent Alexander Litvinenko.
Tests have shown traces of toxic polonium-210 in the Italian academic's body, but he is said to be displaying no symptoms of radiation poisoning.
Mr Scaramella was one of the last people to meet Mr Litvinenko before his death last month, which is being linked to the discovery of polonium-210 in the former KGB agent's body.
Yesterday, airline Easyjet said Mr Scaramella had flown on their flights from Naples to Stansted, on 31 October and from Stansted to Naples on 3 November.
But the Health Protection Agency said it had no 'public health concerns' about those flights.
