With Harriers ahead through Melligan's well-taken 27th minute strike, they began to look far more comfortable in defence against their free-scoring visitors.
Their back three shut up shop quite successfully until half time, making sure United were not given any more chances.
And harriers could have gone further ahead on 41 minutes when another good right-footed shot from Shilton gave skipper Flynn an excellent headed chance at the far post but he nodded wide.
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