Three games in the Ryman League Premier Division on Tuesday night and all had significance at either end of the table.
Bognor Regis Town returned to the summit after beating relegation-threatened Sussex neighbours Burgess Hill Town at Leylands Park.
In front of a crowd of 405, Bognor took a crucial foothold in the game with two goals just before half-time.
The first came when they were awarded a penalty for handball from Will Miles, which saw the defender red-carded.
Former Burgess Hill player James Fraser duly converted the resulting spot-kick.
Five minutes later Chad Field headed the Rocks` second following a free-kick.
The Hillians got themselves back in the game on the hour-mark when James Richmond`s header from a corner bounced over visiting keeper Daniel Lincoln and into the back of the net.
But the visitors restored their two-goal advantage in the 73rd minute when Ollie Pearce fired in underneath Hillians` keeper James Shaw.
Bognor were able to re-take top spot due to overnight leaders Havant & Waterlooville suffering a 2-1 defeat at another side threatened with the drop, Harrow Borough.
It started well enough for the Hawks as they led through Bradley Tarbuck`s 20th minute effort.
And it wasn`t until the 65th minute that the home side managed to restore parity, thanks to sub Lewis Driver.
And then 6 minutes from the end of normal time, another sub, Harry Newman, grabbed a vital three points for Harrow.
The win lifts Boro up to fourteenth in the table, seven points in front of the drop zone.
The evening`s other game concerned the bottom end of the division with Merstham pulling four points clear of the bottom four after a 2-1 Moatside win against fellow strugglers Metropolitan Police.
Defender Oliver Robinson broke the deadlock to give the Met the lead 3 minutes after half-time.
But Dan Bennett proved to be the Moatsiders` hero, bagging a brace in the 54th and 77th minutes to win it for Hayden Bird`s men.