Ukrainian President Volodymyr Zelensky has arrived in the UK for his first visit since the Russian invasion of his country.
On his surprise trip, Mr Zelensky is due to meet Prime Minister Rishi Sunak and deliver an address to Parliament, a rare occurrence for a foreign leader.
The visit is only Mr Zelensky's second outside Ukraine since the war began after he made a whirlwind trip to the United States in December.
