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Margate came from a goal down to beat Met Police 2-1 at Hartsdown Park on Tuesday night.
A crowd of 542 - 1,800 down on last week's derby win over Maidstone - saw Bradley Hudson-Odoi give the visitors a half-time lead in the Ryman League Premier Division clash.
Charlie Allen levelled three minutes into the second half and scored the winner just before the hour.
Second-placed Gate remain two points behind leaders Maidstone, who were 3-1 winners at Witham thanks to Frannie Collin's double and a Jay May header.
New signing Laurence Ball scored for Tonbridge in their 2-1 defeat at East Thurrock.
Former Dover and Margate defender Ball cancelled out Mitchell Gilbey's opener but the Thurrock man scored again on the stroke of half-time.
Michael Power scored a last-minute winner as VCD climbed off the foot of the table with a 2-1 victory at high-flying Leiston.
Tom Bullard gave Leiston an early lead but late goals from Leigh Bremner and Power moved VCD above Hornchurch.
There was an unhappy return to Sittingbourne for Jim and Danny Ward and a number of their ex-Brickies players.
The Whitstable joint-bosses named five former Sittingbourne players in their starting line-up at Woodstock Park.
But two goals from Jono Richardson and a late third by Elie Kayembe saw Brickies to an impressive 3-0 win that lifts them to fourth place in Ryman League Division 1 South.
Second-placed Faversham left it late to win 3-1 at East Grinstead.
The hosts led through John Sinclair but George Monger, Wayne Wilson and Dean Grant turned the match Town's way in the final 15 minutes.
Herne Bay are sixth after Dan Parkinson's 77th-minute goal secured a 1-0 derby win over Ramsgate.
Second-half goals from Greg Andrews saw struggling Hythe Town beaten 2-0 at home by Whyteleafe.
Ten-man Cray Wanderers suffered a 4-1 home defeat by fellow strugglers Redbridge near the foot of Ryman League Division 1 North.
Max Fitzgerald got Cray back into the game after they'd trailed 2-0 but was sent off soon after.
Redbridge put the game to bed with Shaun Wallace (2), Vinny Murphy and Mark Nougher (penalty) their scorers.
Austin Gacheru scored Chatham's equaliser in a 1-1 draw at Thamesmead.
Rob Carter put Mead in front early in the second half, with Gachueru levelling on 68 minutes.