After winning the league the club joined the Spartan League. They won the League Cup in 1974–75, and when the league merged with the Metropolitan–London League to become the London Spartan League at the end of the season, Bracknell were placed in Division One. They finished as runners-up in the new league's first season, losing the title to Farnborough Town on goal average, as well as losing the League Cup final. In 1977 Division One was renamed the Premier Division, and despite finishing fourth in 1978–79, the club were relegated to the Senior Division. They won the Senior Division in 1980–81, earning promotion back to the Premier Division, and the following season saw them finish as runners-up and win the League Cup. They went on to win the Premier Division and the League Cup in 1982–83.