Heritage: We're safe from relegation
The result hauled United 12 points above third from bottom Peacehaven & Telscombe who have only eight games to play.
But Heritage has designs on more loftier goals as Sidley are just eight points off a top five position.
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Hide AdHe said: "I think we are safe - I can't see us going down," he said. "We are now looking to go up the league. We have got to go as hard as we can. It's still our target to finish top five."
United face third-placed Whitehawk at Gullivers on Saturday March 1 before old adversaries Ringmer visit on Tuesday night, kick-off 7.30pm.