The wife of former Russian spy Alexander Litvinenko said the inquest into her husband's death should consider whether MI6 failed in its duty to protect against a "real and immediate risk to life."
Mr Litvinenko had been hired by MI6 for a number of years and was working with the Spanish secret service investigating the Russian mafia shortly before his death, a pre-inquest review at Camden Town Hall, in London, heard.
Mrs Litvinenko said outside the hearing she was pleased the alleged involvement of the Russian government in her husband's murder would now be considered.
"We've been saying this many times but this is the first time this question has been raised in court."
"I appreciate all that was done today and I'm looking forward to any decision which will be taken by the coroner after today's hearing."