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Chatham suffered an FA Cup hangover when they lost 3-0 at Dereham in Ryman League Division 1 North on Tuesday night.
Ryan Hawkins gave the hosts a half-time lead, with Shaun Bammant's second-half double clinching the points against a Chats side playing their first game since losing to St Albans in FA Cup final qualifying at the weekend.
VCD are 17 points clear at the top after an 8-0 home win over Wroxham.
Stuart Zanone scored a hat-trick, including a penalty, with Karl Dent, Peter Smith, Baff Addae, Nick Reeves and Enoch Adjei completing an easy victory.
Ashley Baverstock scored an 83rd-minute equaliser for Whitstable in a 1-1 draw at home to Horsham in Ryman League Division 1 South.
Billy Dunn had given the visitors the lead from the penalty spot on 50 minutes following a foul by John Guest.
Margate beat Folkestone 4-3 on penalties after a 1-1 draw in the second round of the League Cup.
Youngster Gary Vizzard put Blues in front from a Cesc Fakinos cross midway through the second half but Invicta levelled through Johan Ter Horst with seven minutes left.
John Beales gave Margate a 4-3 lead in the shootout before Josh Vincent missed for the visitors.
Maidstone had new signing Jack Harris stretchered off in their 2-1 victory over Herne Bay.
Substitute Frannie Collin put Stones in front on 64 minutes but Jordan Casey levelled 10 minutes later.
Another substitute, Alex Brown, scored the winner with six minutes left.
Thamesmead's tie at Ware was postponed.