The club's golden age was however in the 1920s. Re-formed after the end of the "great war" the team started in the Wellingborough and District league in season 1920–21, winning the NFA junior cup and gaining admittance to the Northants league. the team won the league at the first attempt together with the NFA senior cup. the league title was retained the following season and the county FA's premier competition,the Maunsell cup was also won,a unique cup treble unlikely ever again to be repeated. That same season also saw the club draw at Football League third division north side Chesterfield, 4–4 in the FA Cup, only to lose 1–0 at home in the replay. The club were the highest scorers in the FA cup that year.