JEREMY CORBYN’S Labour leadership campaign storms ahead tonight with a sold-out rally in London, but one MP supporting him has warned that “complacency kills.”

As the momentum behind Mr Corbyn builds, Norwich South MP Clive Lewis called on the leftwinger’s supporters not to get “carried away” by his current surge in popularity.

His call for composure came after thousands turned out to hear Mr Corbyn speak in Birmingham, Liverpool, Coventry and Preston at the weekend.