Studley Royal dropped off the pinnacle of the York Senior League after they were humbled by six wickets on the long trek to Sewerby.
The Royals batted first but opener Charlie Scathard was dismissed for a duck to put them on 0-1.
Fellow opener Steve Walmsley steadied the innings with a measured half century alongside number three Gary Blackburn (43).
Dan Craven (53) then shared a stand of 96 with Walmsley but after the latter fell for 78 the innings stifled to 219-6.
The Royals failed to make early inroads into the Sewerby order as opposition skipper Ben Dobson and fellow opener Leis Beasley both made 40.
Blackburn (2-38)snaffled them both in quick succession to provide hope for Matt Pickles’ side. Walmsley (2-54) trapped number three Chris Chapman (36) and four Russell Robinson (5) to leave the home side flailing on 153-4.
But mid-order pair Michael Artley (45no) and Richard Robinson (42no) put on 79 to reach the target.
Defeat allowed Woodhouse Grange to replace The Royals at the top of the Premier Division by 12 points.
But Pickles’ side have the perfect opportunity to bounce back next weekend as they travel to the league leaders for table topping clash.
They then face Sheriff Hutton Bridge on Sunday in the National Village Cup regional final.
Sessay also lost ground at the top of Division One as they felt the full force of Bridlington to crash to an embarrassing defeat.
Batting first at Dukes Park, Sessay’s top order crumbled under the pressure of Bridlington opening bowler Tom McMeeken (4-35) with only Matthew Till (22) scoring more than 20.
Wickets continued to tumble with the introduction of Casey Rudd and the bowler picked up figures of 5-1 from a 21 ball spell to skittle Sessay for 74.
In reply, the Bridlington batsmen looked more assured on the wicket as Rudd returned to haunt.
Rudd struck 40 not out to coast across the line with Sessay captain Stephen Langstaff the only bowler taking a wicket.
The loss meant Sessay slipped to fifth in Division One, 42 points adrift of leaders Heworth.
Langstaff’s side will look to return to winning ways against basement club Harrogate 2nds at home this Saturday.
Thirsk’s Division Two clash at Clifton Alliance was marred by an injury to their batsman Ross McAndrew who suffered a dislocated knee after reaching 23 not out.
He was taken to hospital by ambulance causing a 48 minute delay. Des Wyrill (39) then made his first substantial innings of the season and Mark Cook hit 33 runs.
But Thirsk were dismissed for 132 and Alliance eased to the total four wickets down.
Thirsk, 11th, face bottom club TABS away next.