Old Northamptonians secured an impressive 41-6 success against local rivals Old Scouts at Billing Road.
ONs, who remain second in Midlands 1 East, ran in seven tries in a convincing victory on home turf.
Guy Holt got the ball rolling before Rory Seymour also wrote his name on the scoresheet.
Adam Frost reduced the deficit with a penalty for Scouts, but Harry Sanderson gave ONs more breathing space with his side’s third try.
Richard Bosworth’s sin-binning gave Frost another three points before the break and Sanderson was also sent from the field.
But being men down didn’t affect ONs and Zac Draper dotted down to make it 22-6.
The next 20 minutes remained scoreless before Phil Beaumont grabbed two quickfire tries.
And there was still time for Holt to get his second score of the game as ONs finished with a flourish.
Charlie Cox took his conversions tally to three for the match.
Meanwhile, Old Northamptonians IIs saw off Scouts IIs 24-19.
Ben Hammersley and Rhys Evans both dotted down twice for ONs, with Jack Cook adding two conversions.
Towcestrians 26 Derby 29
CRAIG HOLTON scored twice, but Towcestrians suffered their second agonising defeat in succession.
Having been edged out late on in a 41-39 reverse at Sandbach on the previous weekend, Tows were narrowly beaten by Derby.
The home side did at least manage to grab a losing bonus point thanks to Pete Gowler’s score.
Sam Sturley was also on the scoresheet, while Ben Roe registered two conversions and James Falvey one.
Belgrave 6 Olney 20
Olney travelled to the north of Leicester for their league fixture with Belgrave on a dry but cold afternoon.
And they were to return home with the Midlands 2 East (South) victory after a game they were always in control of.
Jordan Letts opened the scoring with a penalty and he soon added a second to put Olney 6-0 up.
Belgrave responded with a place kick of their own, but a drop goal and another penalty saw Letts and Olney take their tally to 12 at half-time.
Letts increased the lead to 15-6 after the break and hooker Euan Walker finished things off with the only try of the game after being fed by Jake Deighton.
Meanwhile, Olney IIs lost 27-22 to Leighton Buzzard, Olney IIIs beat Wellingborough OGs 22-17 and Olney Colts beat St Neots 24-14.