The two relegated Kent sides will start the new Isthmian Premier season on the road. Dover, who finished bottom of National League South last season, visit Potters Bar on Saturday, August 10. It’s 15 years since Whites last played at Step 3, Andy Hessenthaler leading them to title glory in 2009. Dartford, Isthmian Premier champions a year later, open the campaign at Cray Valley. The sides were separated by two divisions last season with Darts joining Dover in being relegated, while Steve McKimm’s Millers lost just once en route to Isthmian South East title glory. Chatham Town, last season’s ru…