Two paintings of sunflowers by the post impressionist artist Vincent Van Gogh have gone on display at the National Gallery.
The paintings have been reunited for the first time in 65 years after the Van Gogh Museum in Amsterdam agreed to lend their painting to the Trafalagar Square gallery.
More top news
Pictures of today's events unfolding following a major security incident at the Houses of Parliament.
At least two people have died after a knifeman brought terror to the heart of Westminster.
The Cobra committee brings together government ministers with senior officials of the emergency services and security agencies.