Matt Maule took 4-28 to take Tiddington to a 20-run victory over Oxford 2nd and out of the likely relegation zone.
Oxford had made an impressive start in pursuit of the home side’s 250-8, with openers Adam Price and Adam Hall both scoring 55, and No 3 John Barrett reaching 47.
But Maule intervened to send them spinning to 230 all out.
Earlier, Will Cooper (52) and Matt Johnston (40) had given the home side an excellent start, which was improved by Chris Goodman (44no), Nick Pykett (32) and Maule (31).
Oxford Downs dismissed Wolverton Town for only 118, but still contrived to lose and so stay bottom of the table.
Downs won the toss and soon had their hosts in trouble, with Johnny Law capturing 5-30 from 16 overs and Richard Beer taking 4-31.
Seven of the visiting batsmen reached double figures after tea, but none could go much further and Idrees Butt (5-37) helped bowl them out for 113.
Cumnor’s Max Mannering (4-15) and Devane Warner (3-52) worked their way through Great Brickhill and reduced their hosts to 124 all out.
Only Anton de Beer (40) hung around for long.
The visitors made slow pro-gress towards their modest target, losing six wickets along the way, but Joe Dale (43no) eventually steered them to 125-6.
Former Oxfordshire opener Andrew Sabin rolled back the years to stroke an impressive 80 as Banbury 2nd racked up 230-7 after choosing to bat at Twyford.
He was ably supported by Ed Phillips (37) and Justin Lambden (33).
Shahid Mahmood made 41 after the interval, but Steve Hart (4-13) and Josh Hill (46) were too good and despatched Twyford for 141.
Will Rooney (41), Sam Lachlan (41) and Will Taylor (39) helped Thame Town to 152 all out at home to Buckingham Town.
Seamer Wayne Platts took 4-64 before veteran off spinner James Gear picked up 4-32.
Buckingham were always ahead of the game after the interval, with Ashley Pearson hitting 60 and Simon Myatt 30 in their 153-6.
Chris Leaney produced a match-winning performance to take Aston Rowant 2nd to a surprise victory over promotion-chasing Oxford & Bletchingdon Nondescripts in Division 2.
Nondies' Tim Rattigan is bowled by Chris Leaney Picture: Steve Wheeler
Leaney, who finished with 7-46, ripped through the Nondies middle order to leave the home side with a below-par total of 153 to defend.
Pablo Mukherjee (35) and Chris Day (30) had briefly threatened to wrestle back control, but the innings fell away abruptly once both had been stumped by David Ridgley.
Rowant made a decent start to their reply, with the efforts of openers George Reid (34) and Tom Condon (30) being backed up by Andrew Tolson (47).
By the time Mark Strong picked up three wickets, the game was almost won, and the visitors eventually wrapped up victory with 5.2 overs to spare.
Nondies would have expected better, having thrashed the same opponents by nine wickets on the opening day of the season, but stay in the promotion picture despite this defeat.
Rowant climb out of the bottom two and are within another win of mid-table.
Ryan Gordon hit a magnificent 102 not out as Challow & Childrey inflicted a first defeat of the season on Long Marston.
After electing to bat, the home side made 173 before being bowled out in the 45th over.
Mark Green led the way with 53, while 16-year-old Ross Packham captured fine figures of 4-46.
Gordon then brought up his ton as Challow reached 175-4 with more than 20 overs to spare.
Abingdon Vale crashed to 97 all out on their way to a six-wicket defeat at fellow strugglers Cropredy.
The visitors’ fragile batting line-up was exposed yet again as Jack Campbell (4-39) and Harry Walters (3-31) ran through them.
Joe Fox then reached 34 to set up Cropredy’s first taste of success for the season, and take his side within eight points of Vale at the foot of the table.
Horspath 2nd were forced to chase leather for 53 overs as Bledlow Village amassed 247-5.
Matthew Bolton got the ball rolling with 51, before Adam Mould (71), Matthew Tapping (49) and George Harman (41) cashed in to take the home side to an apparently unassailable total.
So it proved, despite Mark Skelton’s 32 and several other decent contributions, as Horspath were bowled out off the fourth ball of the final over for 186.
Ryan Chapman (3-44) and Ben Moore (3-47) shared most of the spoils.
Cublington had much the better of their draw with runaway leaders Leighton Buzzard Town.
Nick Talbot hit a top score of 49 in their 220 all out, while Tom Light toiled a way to finish with 4-82.
Kieron Sear then bagged an impressive haul of 4-13 as Leighton limped to 145-9.
Division 3 Leaders Great & Little Tew 2nd recovered from 129-6 to reach 232-7 and so beat Bicester & North Oxford by three wickets.
Sam Barnes (40) and Jack Haggett (39) had given Tew a good start, but a mid-innings wobble left them in trouble before Sam Smith hit 54 not out to secure the win.
Earlier, Daniel Murphy made 74 in Bicester’s 231-5.
Ian Demain grabbed 5-19 from 15 overs as Didcot dismissed Sandford St Martin for 146 for a four-wicket win.
Chris Thompson top-scored with 52, while all ten Sandford wickets fell to catches.
The hosts made heavy weather of the run chase, taking 50 overs to reach 148-6, with Martin Anson taking 3-13.
Shipton-under-Wychwood 2nd posted 219-8 at Oxford Downs 2nd thanks to good knocks from No 3 Paul Hemming (50), No 4 David Bugge (48) and No 5 Tim Senior (56).
Tom Ward finished with 5-40 from two spells that spanned 11 overs.
Graeme Coates (42) and Paddy Daniel (40) put Downs in contention, but from 90-1, they crashed to 140-8 and had to settle for a draw on 169-8.
Banbury 3rd consigned Bletchley Town to their seventh defeat from seven completed matches, but were made to work hard.
Steve Talbot hit 55 in Town’s respectable 169 all out, which Banbury knocked off with seven wickets down.
Dinton 2nd never got going after choosing to bat at Buckingham Town 2nd, losing wickets at regular intervals and falling to 135 as Ben Laycock took 4-25.
Former England opening bowler Darren Gough came on first change and took 3-20, but Town still reached 136-5.
Matthew Warner hit 81 for Kingston Bagpuize at home to Horley in Division 4, but it was not enough to stop the leaders maintaining their advantage at the top.
The home side closed on 203-6, which would have been more had Adam Webb not taken 4-45.
David Taylor (53) got Horley off to a flying start, then David Clark (53no) and Darren de Bruyn (42no) swept the unbeaten leaders to 204-4 with 9.2 overs to spare.
Witney Mills amassed 283-6 on their way to an emphatic 153-run home victory over inconsistent East Oxford.
Dan Swindells (80), Pete Claridge (58) and Chaminda Wimalarathna (51no) made the visitors regret bowling first.
Swindells then took 5-13 as East Oxford collapsed to 130 all out.
Chearsley were blown away for only 82 at Blewbury & Wallingford, for whom Charlie Sutton took 4-40 from 17 overs.
Scott Harris also produced impressive figures, taking 2-9 from ten overs, five of which were maidens.
Opener Mark Carey (41) oversaw most of the reply, falling just before the hosts reached 83-2.
Russ Turner’s tremendous 119 not out was the stand-out performance as Bledlow Ridge made 242-7 at home to Great Brickhill 2nd.
Simon Lloyd also batted well for his 63.
The visitors were never really in the hunt, but Ahad Khan hit an unbeaten 85 as they reached 181-6 and safety.
Kimble’s Phil Semmens (6-33) reduced hapless Leighton Buzzard Town 2nd to 63-9 before Sam Roberts (31no) and Greg Cooper (19) gave them a semblence of respectability as they limped to 107.
Kimble lost four wickets before they reached 111-4 in the 29th over.
Abingdon Vale 2nd were knocked off the top in Division 5 after Twyford 2nd held their nerve in a tense run chase at Hales Meadow.
The hosts were defending 176, in which Chris Lim contributed 59 and Ian Perna took 5-33.
Luke Mitchell (4-26) and Matthew Butcher (3-63) looked like bowling Vale to victory, but Sam Lyon (72no) and some late lusty blows took Twyford to 177-7 with 13 balls to spare.
John Mackie’s fine 108 and 91 from Jack Higgs allowed Tiddington 2nd to declare on 300-5 after 50 overs at Oxford 3rd.
The match looked like fizzling out when Miles Picknett made 41 and Bjorn Pedersen posted 40, but Ben Smith (4-40) induced a flurry of wickets to leave Oxford clinging on at 191-8.
Mo Chatterji bagged 7-28 from nine overs as Cumnor 2nd beat Didcot 2nd by 56 runs.
The home side had declared after reaching 263-5 from 46 overs as Dave Ackland (70), Ali Lali (58), Oliver Gray (48no) and Callum Russell (40) all shone.
James Bywater (62) and Prasad Kankadandi (40) put up some spirited resistance after tea, but from 176-3, the visitors fell away to 207 all out.
A thriller at Stokenchurch saw visitors Thame Town 2nd squeeze home by eight runs.
Alistair Thomas (51) and Richard Carr (44) helped Thame reach 201-8, which didn’t look enough while Joe Brown (78) was at the crease.
But Chris Jeffcock (4-23) and Thomas (4-59) chipped away to dismiss Stokenchurch for 193.
Brackley were bowled out for only 121 by Bledlow Village 2nd, but still managed to win and so return to the top.
Roger Downes (5-42) and Adam Tapping (4-15) did the damage for Bledlow, only for Sam Field (4-13) and Joshua Markham (4-54) to fare even better as the visitors were all out for 112.
There were some stand-out peformances in the lower echelons.
Aston Rowant 3rd’s George Storton hit an unbeaten 163 to set up an 80-run win over Oxford & Bletchingdon Nondescripts 2nd in Division 6.
And in a drawn match that produced 557 runs, Nigel Hill’s unbeaten 148 was not enough to earn Challow & Childrey 2nd victory over Long Marston, for whom Matthew Wareham hit an undefeated 134.
Buckingham Town’s Richard Pengelly took amazing figures of 9-16 as Didcot 3rd were skittled for 46 in Division 7, setting up an eight-wicket triumph.
In Division 8, Robert Seymour claimed 6-62 to help Shipton 3rd to an 82-run victory over Oxford & Bletchingdon Nondescripts 3rd.
Ken Cronshaw made 103 not out for Twyford 3rd in their Division 10 draw with Abingdon Vale 4th.