Boss Kevin Hake was relieved to see Chatham finally get the better of Kent rivals Margate on Saturday. Goals from forward Jamie Yila and Rowan Liburd were enough for Chats to win the hard-fought Isthmian Premier home derby 2-1, despite Gate centre-back Tyrone Sterling’s second-half strike. While Chatham are second and fourth-bottom Gate are on a lengthy winless run, Margate had run out 2-0 victors at Hartsdown Park in October and, even before that, had won last May’s Kent Senior Trophy Final on penalties against Hake’s troops at Gillingham’s Priestfield Stadium. “It’s never easy to win a derby…