1–0 to Aldershot in the FA Cup first round. Going straight into the first round the following season, they lost 3–2 at Torquay United. In 1952 they rejoined the Isthmian League, and after finishing as runners-up in their first season back in the league, they were champions in 1953–54. They won the league for a fourth time in 1960–61. After finishing bottom of Division One in the 1974–75 season Bromley were relegated to Division Two. In 1976–77 the club appeared in the FA Cup first round for the first time in over twenty years, losing 7–0 at Swindon Town. Division Two became Division One in 1977, and the club were promoted to the Premier Division after finishing as runners-up in 1979–80. They were relegated to Division One again in 1983–84, but returned to the Premier Division as Division One runners-up in 1985–86. Another relegation followed in 1989–90, but was followed by an immediate return to the Premier Division as Division One runners-up in 1990–91. In 1996–97 they qualified for the FA Cup first round again, but were beaten 3–1 at home by Enfield. Bromley were relegated to Division One again at the end of the 1998–99 season; non-league reorganisation in 2004 saw Division One become the eighth rather than seventh tier of the football pyramid. A fourth-place finish that season saw them qualify for the promotion play-offs, and after defeating Metropolitan Police on penalties in the semi-finals, they beat Horsham 3–1 in the final to earn promotion to the Premier Division. In 2006–07 they finished as runners-up in the Premier Division, again qualifying for the promotion play-offs. A 1–0 win over AFC Wimbledon in the semi-finals and a victory against Billericay Town on penalties in the final saw them promoted to the Conference South. The season had also seen them reach the FA Cup first round again, eventually losing 4–1 at Gillingham. Further appearances in the first round were achieved in 2009–10 (against Colchester United), 2011–12 (Leyton Orient), 2012–13 (Fleetwood Town) and 2014–15 (Dartford), but they were beaten on each occasion. In 2014–15 Bromley won the Conference South, earning promotion to the renamed National League, where they have remained since. Another FA Cup first round appearance in 2017–18 saw them defeated by Rochdale. The season also saw them reach the final of the FA Trophy, where they lost 5–4 on penalties to Brackley Town after the match had ended in