(Photograph) - They’re off : brother and sister Darryl and Alison Scott don’t need an activity co-ordinator to make them exercise. For the past two years they have scootered the half-mile from their home in Muirhead, North Lanarkshire, to St Barbara’s primary. It’s “fun and quick”, apart from the last 100 yards which is up a steep hill. “We sometimes walk up,” Alison says