Boris Johnson says Britain could leave the EU and that he will return to Westminster in 2015. Elizabeth Rigby, deputy political editor, reports on how London’s mayor has set a challenge to David Cameron by positioning himself as a high profile Tory eurosceptic.
Filmed by Steve Ager. Produced by Daniel Garrahan
Welcome to the new FT.com.
The same global insight. Faster than ever before on all your devices.