SOUTHPORT, England — He is the poster boy of the upcoming British Open, his flowing hair and stubbly face adorning the banners draped across lampposts on the approaches to Royal Birkdale. Golf’s oldest major is back in Southport for the first time since 2008 and, in Fleetwood, one of the sport’s rising stars, the locals have one of their own for whom to cheer. Growing up, Fleetwood lived in a house just around the corner from Royal Birkdale. The place held a mystical quality to a golf-loving kid who dreamed of winning the Open Championship from the age of 5. The first British Open he went to watch was at Royal Birkdale in 1998. Fleetwood is at his highest-ever world ranking of No.