Belstone took a significant step towards winning the Premier Division title by beating closest rivals Bovingdon 1-0.
The table-toppers are now three points clear of second-placed Bovingdon after Saturday's top-of-the-table clash, but have played three games fewer.
Goals from Jamie Hurst and Ross Shorto gave Bushey Sports Club a 2-1 victory at third-placed Hatfield Social, while Chipperfield Corinthians moved to within a point of Mill End Sports after an Adrian Abramian goal proved to be the difference between the two sides in a 1-0 win.
Bedmond Sports and Social Club continue to have problems at the wrong end of the table after they suffered a 4-1 home reverse at the hands of Wormley Rovers.
The divisional gap proved too much for Old Parmiterians to bridge as their Aubrey Cup hopes ended with a 5-1 home defeat against top-flight Standon and Puckeridge in the second round.
Dean Seabrook scored Parmiterians only goal, as their opponents progressed thanks to a brace apiece from James Endacott and L Endacott and Jan Stephens' single.
Parmiterians are second in Division One, two points behind leaders Buntingford Town but with a game in hand, and two points further back in third are Evergreen after they beat Hinton 5-2.
Charlie Benning, Luke Jones, Ade Kelani, Ashley Toomey and Elliot Wallis were on target for the home side, with Matt Langley and Alex Puchalla replying for Hinton.
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