A controversial film about the final years of the life of the Princess of Wales gets its premiere in London tonight. The film focuses on Diana's relationship with the heart surgeon Hasnat Khan.
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The 24-year-old was unarmed and the incident is not being treated as terror-related.
Some platforms have been taken out of service with disruption expected to continue until the end of the day.
The Met Office has extended its weather warnings for snow and ice to cover vast swathes of the country, including London and the South East.