Barmby Moor's nine-wicket victory over Burton Salmon ensured that they are promoted from division three.
University Staff will join them after Craig Ronaldson hit 71 not out and Brian Donnelly took 5-32 as Thorpe Willoughby collapsed to 86.
Hirst are still in danger of relegation for the second successive year despite beating Bishopthorpe II, who are now dragged into the relegation battle.
Wheldrake's Kevin Dent had the best bowling analysis of the day taking 7-13 against Woodhouse Grange.
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