Ben Stokes has given up warm-up cricket, pared back his training sessions and, in response to a chronic left knee problem that might have prompted a break earlier on in his career, the all-rounder has cut his bowling to moments of absolute necessity.This is not to say Stokes is not putting in. Far from it. It is just that the less the England captain pays heed to the demands of maintaining his personal output, the more this team appear to take on some of the unquantifiable aspects of his cricket; the aura, the golden arm, and that unrelenting forward momentum.