A calf injury has kept Buttler on the sidelines since July and a recent setback – which saw him miss Lancashire’s Vitality Blast quarter-final – has extended his lay-off.Salt, who deputised for Buttler at Manchester Originals in this season’s Hundred tournament, will lead his country for the first time at the Utilita Bowl on Wednesday before games at Sophia Gardens and his home ground of Emirates Old Trafford.England have already started blooding a new generation of leaders this summer, with Ben Stokes’ torn hamstring allowing Ollie Pope to take charge of the ongoing Test series against…