Eton Manor lost 14-12 at Ruislip on Saturday, meaning that with just one Division One fixture remaining they trail Westcliff by two points.
In a highly competitive fixture it was Manor who drew first blood in the 27th minute, taking advantage of Ruislip's indiscipline and numerical disadvantage, Will Mobray breaking to score under the posts before Callum McKie added the extras.
Ruislip did not have to wait long to touch down for the first time, their number eight scoring from five metres before the extras were added, the first half ending 7-7.
Six minutes into the second half Ruislip took control, an unstoppable driving maul crashing the ball over the line before a tricky conversion added the extras to put Ruislip 14-7 ahead.
Chasing the game, a yellow card for fly-half McKie only increased the difficulty of the task in hand for Manor.
With ten minutes left to play, Manor got their second try when Reece Reed outpaced a couple of Ruislip defenders before being brought to ground just inside Ruislip’s 22. Reed still had the vision and presence of mind to pop the ball to the supporting Chris Jones, who sprinted over the line from 20 meters out to bring the score to 14-10.
The covering Ruislip players had prevented Jones from getting too close to the posts, so with regular kicker McKie still in the sin bin, it was left to Reed to take and miss the resulting conversion.
Manor are away to Luton on the final day of the season, with league leaders Westcliff travelling to North Walsham, who are unbeaten at home this term. If Manor can better Westcliff's result, the Division One title is theirs.
Chingford were on the receiving end of 13 tries as they were crushed 83-12 by Colchester on Saturday.
Colchester immediately took the lead when Adam Cook touched down under the posts.
Number eight and captain Calum Irvine added a second shortly after as Colchester took full advantage of a wayward Chingford kick.
Dave Philp, Matth Smith and Jon Vine all scored in quick succession before Chingford's Marcus Hughes got the hosts on the scoresheet.
Leading 33-5 at the break, Colchester began the second period as they meant to go on, Smith adding his second before Liam Pickett brought up another five points.
Philp claimed his second try before Dave Howells scored a converted try for Chingford to make it 48-12.
Chingford's try spurred Colchester on, and the visitors scored again through Gregor Irvine before George Liversidge added two further scores.
C.Irvine scored his second and John Davitanivalu scored another to round off of resounding victory.
Elsewhere, Woodford beat bottom of the table Old Haberdashers 29-20 to confirm an 11th place finish for the season.