After two season in the Isthmian League, Bashley were moved to Division One South & West of the Southern League. The club won the division at the first attempt, earning promotion to the Premier Division. The following season saw them finish fifth in the Premier Division, qualifying for the promotion play-offs; however, they lost 4–1 to eventual winners Team Bath in the semi-finals. In 2013–14 they finished bottom of the Premier Division and were relegated back to Division One South & West. Despite finishing bottom of the division the following season, the club avoided relegation. However, they finished bottom of the division again in 2015–16, failing to win a league game all season, and were relegated to the Premier Division of the Wessex League.