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Gravesend remain top of London 1 South after their 10-5 win in a mudbath at Thanet on Saturday.
In atrocious weather, Thanet kicked-off with the wind behind them and their forwards kept Gs penned in their own half.
After being camped five metres out for several phases, they drove Gs defensive line back, to open the scoring after 14 minutes with a converted try.
Gravesend eventually took the lead after Thanet saw a man sent to the sin-bin for repeated misconduct on 34 minutes.
Within four minutes, Clement moved the ball to fly-half Dave Dalton who showed his pace before touching down.
Dalton kicked the conversion to edge Gs ahead at 7-5 and added a penalty after the break. The home side were kept at bay from then on.