Andrew Wingfield Digby rolled back the years to take 7-34 as Bicester & North Oxford 2nd took over at the top of Division 5 by beating Leighton Buzzard Town 2nd.
Town were toppled in 45 overs for 106 as Wingfield Digby and Michael Simpson (3-20) wreaked havoc.
Gary Sansome's 57 not out then helped Bicester to 107-2 .
L Buzzard 2nd 3pts, BNO 2nd 25
Morning leaders Wallingford drop to second after being on the wrong end of a draw at local rivals and relegation candidates Challow & Childrey 2nd.
Owen Dimbylow (65) was the mainstay of the home side's 237-7, which looked like being a winning total when Wallingford were 43-3. But Rob Sessions (56) steered them to safety on 190-7.
Challow 2nd 14, Wallingford 9
Wallingford can still be caught by Chearsley, who enjoyed an easy home win over Oxford & Bletchingdon Nondescripts 2nd.
Ten-man Nondies were dismissed for 153 by Marc Hignell (5-28) as only Chris Day (42) got going.
Neil Davies was undefeated on 83 when the hosts reached 154-2 in the 26th over.
Chearsley 25, Nondies 2nd 4
Abingdon Vale 2nd are back in the bottom two after losing to Banbury 3rd by nine wickets.
Alec Inns hit 56 and Ian Woodworth took 4-31 in Vale's 175 all out, then Jamie Coles (64no) and Ally Jarvis (52no) and Jonti Cooke (50) made the run chase look easy.
Banbury 3rd 25, Abingdon V 2nd 4
Piers Myatt's 4-19 helped Great & Little Tew 2nd restrict Bledlow Ridge 2nd to 174-9.
Tew lost seven wickets in reply, but Andy Darby (43) led them home in the 44th over.
Bledlow R 2nd 10, Gt & L Tew 25
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