Ex-Harrier Yates was off for Cheltenham on the stroke of half-time with substitute Jackson taking his place.
Harriers continued to enjoy the majority of the possession but were finding it difficult to break through a competitive Cheltenham defence. Scott Stamps
Only an excellent challenge from Bird prevented Williams getting a clear sight of goal on 55 minutes.
And the home side's left-back Stamps was booked six minutes later for kicking the ball away after a foul by Shilton.
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