Banbury Bulls battled to a 14-10 victory at Stewarts & Lloyds to maintain second spot in Midlands 3 East South.
Centre Pete Papenfus and scrum half Justin Parker scored their tries with Papenfus converting both.
A brace of tries from Ben Lacy helped Harwell to a 29-17 victory at Grove 2nd.
Doug Bosley, Lee Lewis, who kicked two conversions, and Justin John also crossed the Grove line.
OTHER SCORERS BB&O Premier A: Buckingham 2nd 0, Oxford Harlequins 2nd 33 (tries J Keown 2, S Bassett 2, P Trotter; cons M Riley; pens Riley 2); Maidenhead 2nd 44, Witney 2nd 5 (try M Fuller).
BB&O 1 North: Bicester 2nd 10 (tries E Rakacikaci 2), Witney 3rd 16.
BB&O 1 South: Oxford Harlequins 3rd 7 (try P Gray; con I Phillips), Shire Hall 24.
BB&O 2 North: Milton Keynes 3rd 6, Gosford All Blacks 2nd 20 (tries J Briggs 2, A Harbottle, A Sheppard).
Friendly: Abingdon 17 (tries A Boodell 2, S Beackon; con I Thompson), L'ittlemore 17.
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