The public are being urged to call 999 if they spot a missing teenage girl. Alexia Boulton-Miller, 15, and was last seen in Sittingbourne town centre at around 2.30pm yesterday (June 28). She is white, of slim build, around five feet and five inches tall and has long brown straight hair. When last seen she had her hair down and she was wearing black leggings, a black long sleeve top with three white stripes down the arms and black trainers. Police say Alexia has links to the Ramsgate, Margate, and Rainham areas. Anyone with information on her whereabouts should call 999, quoting reference 28-1…