By Jessica Frank-Keyes Keir Starmer will today launch Labour’s “down payment for change” in a pre-election doorstep offer to voters. The Labour leader will speak at an event in Essex where he will outline the party’s six ‘first steps for change’, including promises to deliver economic stability and boost public services. Starmer is expected to describe the promises as “a down payment on change – on our determination to begin a decade of national renewal”. He will say: “These first steps make real our claim that a changed Labour Party is back in service of working people. “They show our priorit…