Sir Keir Starmer is travelling to Kyiv to sign what Downing Street is calling a "landmark 100-year partnership" with Ukraine. The pact would formalise economic and military support already pledged to the country, and offers more.

Prime Minister Keir Starmer pledged on Thursday to work with Ukraine and allies to offer Kyiv robust security guarantees if a ceasefire is negotiated with Russia, offering more support to President Volodymyr Zelenskiy with a 100-year partnership deal.

While air raid sirens during visits by foreign leaders have sounded before, it is rare for air defenses to actually have to fight off attacking drones.