Dorking Wanderers look all set for another title after they extended their lead at the top of the table to a seemingly unassailable 13 points with victory at relegation threatened Wingate & Finchley.
Wanderers profited on second-placed Haringey Borough being held to a goalless draw at third-placed Merstham.
Tonbridge Angels and Enfield Town picked up victories over AFC Hornchuch and Whitehawk respectively to keep their hold on the last remaining play-off positions, leapfrogging Worthing United who could only muster a draw at home to Brightlingsea Regent.
At the bottom, Burgess Hill Town look increasingly cut adrift, after falling to a 3-0 defeat to 10th place Leatherhead, while Harlow Town picked up a massive three points to pile the pressure on Whitehawk, after they beat badly out of form Kingstonian 3-1.