Sir Keir Starmer has called for the US to provide a "backstop" to deter Russia from attacking Ukraine again after meeting with European leaders for emergency talks on the future of the war.The Prime Minister warned that allies across the continent - including Britain - will have to "take responsibility" for its security by bolstering both defence spending and capability following a meeting with partners in Paris on Monday.Sir Keir has said he would be prepared to put a peacekeeping force into Uk

Sir Keir Starmer has called for the US to provide a "backstop" to deter Russia from attacking Ukraine again after meeting with European leaders for emergency talks on the future of the war.The Prime Minister warned that allies across the continent - including Britain - will have to "take responsibility" for its security by bolstering both defence spending and capability following a meeting with partners in Paris on Monday.Sir Keir has said he would be prepared to put a peacekeeping force into Ukraine in the event of a deal to end Russia's war after Washington warned it would reduce its defence commitments in Europe.