OXFORD Quins held their nerve to secure the South West 1 East title with a 51-30 win over Chippenham.
The hosts could not afford to slip up at Horspath Sports Ground, with Banbury Bulls three points behind.
And Quins ran in eight tries, Joakim Antoniou scoring a hat-trick, to spark scenes of celebration.
They took the title despite a five-point deduction, which could have been increased if their senior and age-group teams picked up five red cards combined this season.
Facilities manager James Knox said: “We had a Sword of Damocles hanging over us, but our disciplinary record has been excellent.”
Banbury did all they could with a 38-27 win at fifth-placed Witney.
The north Oxfordshire side will also be promoted.
Grove finished 11th after losing 33-7 at Newbury Blues.
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