The power battle over Vanessa Gold’s shares and the David Sullivan Panorama allegations are overshadowing the start of the season in the Championship There have been 10 summers of West Ham’s London Stadium tenancy and a number of winters of discontent. As the Hammers kick off their new season on Saturday, their Carabao Cup first-round fixture with Portsmouth serves as a stark reminder of reduced circumstances, further confirmation of last season’s relegation from the Premier League. The summer…