Jake Heath made an impressive return for Byfield with 12 overs two-30 on a good pitch, Andy Rutherford (44 not out) and Mark Hibberd (42) helped Radway to 204 for six.
Steve Clayton (30) and Paul Adkins (91) put on 100 for the first wicket before Marc Willis (42 not out) and Paul Wills (33 not out) saw Byfield home with seven overs to spare.
In Division One, Thornborough (212 for seven) beat Willoughby (197 all out) by 15 runs.
Bowling first Willoughby took wickets on a regular basis, but Stuart Parker stood firm for the hosts, finishing unbeaten on 103 as Thornborough closed on 212 for seven. John Gregson, Ashok Badia, Simon Nicholls and Tom Hill were all among the wickets.
In reply, Bhavik Solanki and Johnny Cumiskey got Willoughby off to a flying start. Solanki fell with the score on 52 for one, before Cumiskey and Neal Jones then put together a solid partnership. Cumiskey hit a full toss straight to square leg and was caught for 41, before the LBW of Dave Alcock, followed by the quick departures of Graham Hallam and Robin Corrigan dented hopes of reaching the target.
Tail-ender Badial made it a close finish with a powerful 29 not out, but with the field set out he was run out in the last over, leaving Willoughby all out for 196 and their target just out of reach.
In the same division, Hinton in the Hedges (155 for eight) beat Woodford Halse (154 for eight) by two wickets.
Woodford's Lloyd Parkingson hit 42, Steve Jones and Dean Haynes got 24 apiece. Paul White returned bowling figures of three-28 and Andy Stevens three-29.
In a low-scoring game Boddington were beaten by Crowns by one wicket.
Boddington won the toss and chose to bat first. Hoping to have an advantage by fielding, Crowns restricted Boddington to a below-average 89 runs allowing the visitors to scrape a one-wicket victory in Division Three.
An impressive undefeated ton from Cameron Waldron, a half-century from Andy Lord (58) and Peter Walters (37 not out) helped Gayton (240 for three) to a seven-wicket win over Byfield A (236 for six).
In reply, Byfield's Eli Heath hit a worthy 89 not out, Darren Wheeler, 49 not out, and Chris Reeve returned bowling figures of four-50.
In Division Two, the incursion onto the field by a weasel, (or was it a stoat?) did little to assist Preston Capes in their clash with a strengthened Evenley Xl. Mark Daynes (32), brother Matt (23) and Stuart Wilson (35) were the only batsmen to reach double figures in a below-par innings of 134, which came to an end six overs short of the full 40 over allocation.
Although this proved to be key, Alex Strong with a fiery opening burst, removed both Evenley openers and the visitors were soon struggling at 44-four. But the lower middle order kept a tight attack at bay and although Strong finished with six-51 from his 11 overs.
Evenley scraped over the finish line nine wickets down in a tense finish. Not for the first time this season, Capes were left to rue their performance with the bat.
There was a defeat also for Woodford A in their Division Four game against Marston St Lawrence A.
Marston (109 for one) beat Woodford (108 all out) by nine wickets with Steve Bussy scoring 73.
Preston Capes A achieved an 87-run victory against Middleton Cheney A with half centuries for Graham Unsworth (50), Shane Mackay (52) and Kyle Kalym (51) and Middleton's Tom Dixon also scored 52.
Happy news from The Green where Willoughby A maintained their 100 per cent record with success over their Northampton Grange Park counterparts.
Batting first, the hosts set the visitors a challenging total with Si Blunden (34), Gurj Rupal (25), Trevor Goodwin and Kev Dyke (both 23) contributing to final total of 189 for nine.
In reply, Grange Park's batsmen also chipped in but without making any solid contribution to threaten the Willoughby total.
Blunden took four for 13 to cut into the late order while Ryan Perry took three for 26 as Grange Park were bowled out for 103, giving Willoughby victory by 86 runs.
Flecknoe (256 for seven) beat Maids Moreton (90 all out) by 166 runs.
Flecknoe's Matt Binder scored 68, Tom Pewtress 46 and Dave Annetts 38 while Maids Moreton's Adam Davis scored 41.
In Division Five, Braunston (249 all out) beat Priors (143 all out) by
106 runs.
Braunston's Mainak Ray hit a stunning ton of 119 while team mates Rowan Gutteridge (31) and Shaun Harnett (23) helped along the total.
Oscar Heath hit 55 and had bowling figures of five-33 while Ash Watts (four-49) was also noteworthy.
Meanwhile in the Division Four and Five KO Cup, Preston Capes A (189 for one) beat Maids Moreton (84 all out) by 105 runs.
Highlights were Preston Capes' Alex Strong (96), Richard Parsons (41 not out) and James Wright (32 not out).
In the Wardington Cup, Preston Capes beat Sibford by 10 wickets with Alex Strong 27 not out and Ben Strong 21 not out. Alex Strong also achieved four-six.
Byfield (176 for six) beat Grange Park (99 for three) by 77 runs.
Byfield's Paul Adkins got 49 and Joe Fox 30 while Grange's Lee Roberts made 49 and Ian Peterson 36.
Gayton beat Wardington by 10 wickets.