HASTINGS United have seen their cushion over the bottom four in the Ryman Premier relegation zone cut to six points.
Leatherhead boosted their prospects of avoiding the drop with a surprise 2-1 win away to play-off hopefuls Cray Wanderers on Sunday.
The U’s were in action the previous day when they were beaten 1-0 at home to fourth-placed Bury Town, with the only goal coming 15 minutes from time.
Horsham have already been relegated, and Aveley and Tooting & Mitcham United seem certain to join them, but the fourth and final relegation place is still up in the air.
Leatherhead still have home fixtures to come against Aveley and Horsham, and maximum points from those two games could well drag one from Harrow Borough, Hastings, Carshalton Athletic and Wingate & Finchley into the danger zone.
Ryman Premier standings (played-points): Billericay Town 36-76, AFC Hornchurch 35-69, Lowestoft Town 34-66, Bury Town 35-63, Cray Wanderers 34-58, Hendon 35-57, Lewes 36-57, Kingstonian 35-55, Metropolitan Police 34-54, Concord Rangers 35-53, Canvey Island 35-53, Wealdstone 32-52, East Thurrock Utd 33-47, Margate 34-46, Wingate & Finchley 35-43, Carshalton Athletic 35-41, HASTINGS UTD 35-40, Harrow Borough 35-37, Leatherhead 36-34, Tooting & Mitcham Utd 35-26, Aveley 36-25, Horsham 36-15.