Dringhouses, who have two games in hand on the leaders, swept aside Easingwold with a 5-0 victory. Joe Galloway scored a first-half hat-trick, before adding a fourth in the second period. Liam Robertson rounded off the scoring.
Wigginton also gained a 5-0 victory at the expense of Huntington Rovers. Ben Thompson marked his return from injury with a first-half brace, a feat matched by Tom Derbyshire in the second period. Rob Orr then scored the goal of the game from 30 yards.
Pocklington hammered newly-crowned reserve 'B' champions Tadcaster Magnets 6-2.
Nathan Dickinson added a second ten minutes later but Malton gained a deserved point through two Si Reeve goals.
Brooklyn were crowned champions of reserve 'C' with three games remaining, after Tom Everitt and Calum Smith scored either side of half-time to give them a 2-0 win over Civil Service.
F1 Racing and Rufforth completed their reserve 'D' seasons, F1 emerging as 2-1 winners over their hosts.
Mark Foster grabbed both goals for F1, with Danny Smith notching for Rufforth.
James Haughian and James Hopwood gave Wilberfoss a 2-0 half-time lead against Cliffe in the reserve 'D' supplementary competition. However, a Nigel Horner second-half double meant that honours ended even.