John Doyle, Jubilee line general manager for London Underground: said:
“The unions have informed us that they are in dispute with us over what they perceive as a breakdown in industrial relations. We are keen to understand their concerns and so will be meeting with the unions later this week to discuss these issues in greater detail.”
More top news
He is the first professional rugby union player to do so - and told ITV News he hopes he can be an inspiration to young people.
An inquest into the death of a 14-year-old cadet heard how his teammates tried to radio for help in his final moments.
Ecuadorian officials considered a number of plans to smuggle the Wikileaks editor-in-chief out of their embassy in London.