PFC Durrington are now four points clear at the top of the Premier Division after putting five past title rivals Meadow Park without reply.
Durrington have two games in hand and a superior goal difference to second-placed Park.
Harnham are not quite out of the race yet.
Their 3-0 win against Salisbury Arms leaves them three points behind Park with a game in hand.
Stockton & Codford booked their place in the final of the Chalke Cup with a 4-2 win against Netheravon. Codford broke the deadlock through Ben Ronning but Netheravon levelled via a spot kick and then took the lead. Jay Rideout scored a cracking goal to send the sides in level at the break.
The second half proved a pulsating battle with both sides creating chances.
However, Ronning's second of the game put the hosts in the driving seat.
He later completed his hat-trick to help set up a final meeting with Enford who beat Castle Street Club 7-2. Tom Adams netted four of their goals.
Chalke Valley and Hopback United will contest the final of the Riley Cup.
Valley, who started as underdogs in their Semi-final with Stratford SC, ran out 1-0 winners in a thrilling encounter.
Stratford 'keeper Blaine Dyer was in fine form throughout denying Valley on numerous occasions. Chalke's custodian Chris Hiller also needed to be alert to keep Stratford out.
However, Lee Callender grabbed the all-important goal following a speedy break by Paul Palmer.
Hopback booked their final place with a 3-1 success against Laverstock.
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