Swifts were given a mountain to climb when Harriers grabbed two more goals in two minutes to go three up.
Shilton made it 2-0 with 28 minutes gone after collecting a Ducros pass and showing swift feet to dance through the defence before tucking a confident finish into the net from 12 yards.
Within a minute Ducros dispossessed keeper Hipkins on the right-hand side of the area and laid the ball back for Foster to sweep home from close range.
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