Hounam arrived at London's Heathrow airport on Friday, a day after Israeli authorities released him from detention and expelled him from the country.

Hounam had returned to Israel last month to cover Vanunu's release from prison and film a documentary for the BBC.

Arrested in Jerusalem by Israeli security services on suspicion of espionage, Hounam said he was deprived of sleep and prevented from speaking to his wife.

Hounam's interview with Vanunu for London's Sunday Times newspaper in 1986 helped expose Israel's nuclear secrets.