Blackfield and Langley left the Universal Components Stadium with at least one hand on the championship trophy after a comfortable win over their nearest rivals, writes John Davis.
The victory gave them a four point advantage over the Bluebells with three league games remaining and, barring a late blip in form, they seem likely to lift the title at the end of their first season in the Evo-Stick Southern League.
Yate always looked to be on the back foot despite drawing level early in the second half and in Lerone Plummer the visitors had the one individual capable of stamping an indelible impression on the game.
A Mike Bryant header and two efforts from Nick Peare were all Yate managed in the first half while Pat Nolan tested the home defence with several dangerous long throws and Plummer almost squeezed a shot past James Carey on the near post.
It was a piece of magic from Plummer that set up Blackfield's opener. His deft back-heel just inside the box provided the opportunity for Liam Robinson who steered his shot into the far corner with Carey at full stretch.
Ollie Mehew went down in the box following an Adam Price corner early in the second half but appeals were waved away before the home team did get back into the game with a well worked goal.
Josh Ford picked out Nick Humphreys with a cross-field pass and after some faultless control the full-back whipped a low centre into the goalmouth where Jack Twyman came stooping in to head the ball past Lewis Noice.
That was as good as it got though. Within two minutes Plummer had headed in a Robinson assist to put Blackfield 2-1 ahead and then Mayson Evans was sent off after a second bookable offence.
Within minutes the visitors were 3-1 in front as Plummer took full advantage of hesitancy in the Yate backline and advanced to beat Carey as the goalkeeper came off his line.
A free kick from Peare whistled just over the crossbar at the other end before Blackfield capped a consummate all-round display with a fourth goal, that man Plummer forcing a diving save from Carey and Tom Bearwish following up to hammer in the rebound.
Yate man of the match: Sam Kamara (Tireless work in midfield and always available in link-up play.) Attendance: 430. Entertainment rating: 4/5.
Yate Town: Carey, Evans, Humphreys, Peare, Ford, Boulton, Price (Sims-Burgess 76 minutes), Kamara, Mehew, Bryant (Brokks 87 minutes), Twyman (Langworthy (84 minutes). Subs not used: Keightley, Owers.
The tough trip to play-off hopefuls Cinderford Town now follows on Saturday with a reviving Melksham Town the visitors to the Universal Components Stadium on Easter Monday.
Updated 13:27 - 15 Apr 2019 by Sebastian Parker