By Ashley Cowburn Labour’s business chief has failed to pledge the party will hit its commitment to spend £28billion on a flagship green energy plan. Grilled on BBC Breakfast over whether the huge investment was still a pledge, Jonathan Reynolds prompted further uncertainty as Labour wobbles on the policy. He said: “The overall amount of spending is determined by our fiscal rules and the health of the economy. And of course it takes into account what the Government is already spending. It’s not a sum of money you put on top of what is already taking place.” The Shadow Business Secretary added:…