At a pre-inquest review at Barnet Coroner's Court, Ashley Underwood QC outlined the facts that will need to be established.
The pre-inquest review has previously been told that Mr Litvinenko was working alongside Spanish spies for MI6 in the days before his death.
The pre-inquest review, presided over by Sir Robert Owen, a judge sitting as coroner, is looking into the scope of the inquest into his death.
St Pancras coroner Dr Andrew Reid is holding a pre-inquest review where he will decide whether he or a top judge should hear the inquest into the death.
BBC: Alexander Litvinenko murder was 'London nuclear terror'
He announced the plan at a pre-inquest legal review considering the scope of the inquest, due to start in May.
The pre-inquest legal review has previously heard that Mr Litvinenko was working alongside Spanish spies for MI6 in the days before his death.
An inquest has suggested a review of parking on a main road in Trinity where a man died in a car crash in Jersey.
BBC: Inquest calls for review of road after fatal Jersey crash
"We will review what we heard at the inquest and then we will make a decision as an organisation as to whether we take further action, " he said.
Following the inquest in August the Metropolitan Police also began its own review into how police deal with mentally ill people in police custody.
BBC: Criminologist to review watchdog's custody death inquiry
Francis Rowntree's family said they were considering seeking a judicial review of Mr Leckey's decision to suspend the inquest.
At the review it also emerged that certain British government departments have not yet handed over material relevant to the inquest which was requested in January.
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