The inquiry is also considering publicinterestimmunity applications from MI5 and the MoD aimed at restricting its material at the hearing.
BBC: Derry Guildhall
2.
The third set of appeal grounds also relate - according to the documents - to undisclosed information for which the UK Government had sought publicinterestimmunity from disclosure.
BBC: Law chief 'deplores' bomber claim
3.
The UK government's publicinterestimmunity (PII) application to exclude sensitive information is being opposed by lawyers for Mr Litvinenko's widow as well as media organisations, including the BBC.