Coroner Sir Robert Owen has upheld a request by Foreign Secretary William Hague to keep secret any evidence that Russian state agencies may have been involved in Alexander Litvinenko's death.
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The Duchess of Cambridge has been driven to St Mary's Hospital in London in the "early stages of labour", Kensington Palace has said.
The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.
Police have arrested a man wanted in connection with a burglary at the home of pensioner Richard Osborn-Brooks.