Kane Swallow (pictured) notched two of Haven’s goals and also had another two ruled out as Peacehaven eased their way to their third consecutive win.
Swallow’s first goal was from a Shaun Tait cross and the striker buried it high into the net. Shortly after, he had another chance, but fired over.
On 16 minutes it was 2-0 to the home side when Ben Dinnage headed home after good work with Craig Avens.
Haven were rampant and just two minutes later defender Harry Mills headed just wide.
With Peacehaven pressing for a third, on 35 minutes a corner from Mitch Ford found Ryan Dinnage but he was just wide of the post.
With half time approaching, Swallow hit his second when he fired past the keeper from 18 yards.
But Hailsham were not about to lay down and in time added on at the end of the first half they pulled a goal back.
And then on 54 minutes, the game was made safe when Mitch Ford got the fourth, and his second in two games, when he buried his left foot shot from 18 yards.
Peacehaven still pressed with Swallow, Joe Radley-Martin and Ben Dinnage all going close.
The next time you can see the under 21s in action is next Monday, September 11 when they are at home to Rottingdean Village. Kick-off 7.45pm.
Tonight the first team are in league action at AFC Uckfield Town and this game kicks-off at 7.45pm.
Updated 09:30 - 5 Sep 2017 by Pitchside View