Charlton was also an ever-present figure for the club in the 1956–57 and 1957–58 seasons, and played for the London XI in both legs of the semi-finals of the 1955–58 Inter-Cities Fairs Cup against Lausanne Sports.
Charlton was also a constant presence at the club during the 1956–57 and 1957–58 seasons, and participated in both legs of the semi-finals of the 1955–58 Inter-Cities Fairs Cup against Lausanne Sports for the London XI.