Sir Sadiq Khan has been informally advising the Democrats’ left-wing New York mayoral candidate on how to win his election.
Zohran Mamdani, 33, shocked America’s political establishment last month by defeating the former governor Andrew Cuomo in the race to secure his party’s nomination.
Sources say Mamdani and Khan have since exchanged texts and spoken over the phone. Khan’s advisers have also been in contact with Mamdani’s campaign team.
