In the judgement this afternoon, Sir Robert Owen also agreed not to include any evidence questioning whether the UK authorities could have prevented Litvinenko's death.
The coroner admitted the exclusion of this evidence could result in the inquest becoming "incomplete, misleading and unfair" and took the unusual step of inviting the government to hear the secret evidence in a separate secret inquiry behind closed doors.
The inquest is scheduled to begin on 2nd October.
More top news
Members of the RMT union will walk out in a row over the role of conductors, causing fresh misery for hundreds of thousands of passengers.
The five year long jail sentence of a London mother held in an Iranian jail has been upheld.
Barnet police are investigating four separate anti-semitic offences in the last two days