[4] During the 1930s, the club's headquarters were at the Black Boy pub on Market Hill, with opposition players using it as a changing room.

[6] They also reached three Suffolk Senior Cup finals in four years between 1951 and 1954 but lost them all, losing to Stowmarket Town and then twice to Long Melford.

[3] In 1954–55, they again reached the fourth qualifying round of the FA Cup, losing at home to one of the best amateur teams of the era, Walthamstow Avenue[3] and despite only finishing fifth in the league, a fifth application at the end of the season saw the club eventually win admission to the Eastern Counties League, defeating Holbeach United by a single vote.

[1] In 1955–56, they appointed former Crystal Palace winger Wally Hanlon as manager and finished sixth in the new division and again reached the fourth qualifying round of the FA Cup, losing to Southall.

[3] Again, they reached the fourth qualifying round of the FA Cup, losing this time to Ely.

They lost the Suffolk Premier Cup final the following year too but in 1972–73 they won it for the first time under manager Bill Wilkie, beating Bury Town 4–0.

[3] The following season under Paul Smith as player-manager, they won the Eastern Counties League for the first time, as well as retaining the Premier Cup.

[7] The following year they only conceded one goal on the way to the 1989 FA Vase Final and in the second leg of the semi-final against Hungerford Town, a record crowd for a competitive game at Priory Stadium saw Sudbury win 6–0 to reach Wembley.

[9][10][11] After a 1–1 draw in the first match, Tamworth won the replay 3–0 at Peterborough United's London Road Stadium.

However, this arrangement was felt to be holding the club back, and in 1951 a limited company was formed to purchase a nearby water meadow for conversion to a new ground that became the Priory Stadium.

A record attendance was set at the first final of the Suffolk Premier Cup in 1959, which had become the county's top competition, with 3,712 watching Bury Town beat Long Melford.

[1] Plans were made to relocate to a new ground, the Brooklands Stadium, in Great Cornard during the late 1980s, but failed to come to fruition.