[3] Billy Blan played at second-row in Wigan's 8–3 victory over Bradford Northern in the 1947–48 Challenge Cup Final during the 1947–48 season at Wembley Stadium, London on Saturday 1 May 1948, in front of a crowd of 91,465.
[7] Billy Blan played at second-row and scored a try in Wigan's the 9–3 victory over Belle Vue Rangers in the 1946–47 Lancashire Cup Final during the 1946–47 season at Station Road, Swinton on Saturday 26 October 1946,[8] played at second-row in the 10–7 victory over Belle Vue Rangers in the 1947–48 Lancashire Cup Final during the 1947–48 season at Wilderspool Stadium, Warrington on Saturday 1 November 1947,[9] played at second-row in the 14–8 victory over Warrington in the 1948–49 Lancashire Cup Final during the 1948–49 season at Station Road, Swinton on Saturday 13 November 1948,[10] played loose forward and scored a try in the 20–7 victory over Leigh in the 1949–50 Lancashire Cup Final during the 1949–50 season at Wilderspool Stadium, Warrington on Saturday 29 October 1949,[11] and played loose forward in the 28–5 victory over Warrington in the 1950–51 Lancashire Cup Final during the 1950–51 season at Station Road, Swinton on Saturday 4 November 1950.
[12] Billy Blan joined Wigan from the Royal Air Force straight after World War II, and won a Championship medal in his first season.
[14] After Billy Blan finished his playing career, he worked as Wigan's Lottery Manager in Pools Office.
The Civil Registration index gives William Blan's district of birth as being Barnsley, whereas other sources state Wigan.