LONDON, June 8 : Uber said its users could sign up from Monday for a chance to ride in London's first robotaxis powered by AI technology from British start-up Wayve as soon as regulators give the go-ahead for launch, which it expects in the coming months. Autonomous vehicles are a strategic priority for the ride-hailing company, and it has partnered with more than 30 firms across the world on self-driving freight, delivery and taxi services, with millions of autonomous trips already taken. In