CHUKA UMUNNA broke ranks with fellow Blairites yesterday by calling on colleagues to rally around the new Labour leader — even if it turns out to be Jeremy Corbyn.

The shadow business secretary is backing Liz Kendall in the contest, who has said she would refuse to serve in Mr Corbyn’s shadow cabinet.

And he expressed “grave” concerns over some of the left-wing candidate’s proposals, such as renationalising some industries and pulling Britain out of Nato.