Sir Keir Starmer has criticised Rishi Sunak’s absence at the World Economic Forum in Davos, and said his own attendance alongside shadow chancellor Rachel Reeves is a “statement of intent” of the UK’s increased presence on the global stage under a Labour government.The Labour leader also blamed the UK’s economic woes on the lack of a strategic plan for growth and a “sense of instability and drift” caused by the recent turmoil in the Tory party.