Thamesmead F.C. was formed in 1969 as a community team for local youngsters. The club merged with Southlake FC in 1973, and by 1979 were fielding a Saturday team, playing on park pitches at Crossways. In 1980 the club entered the London Spartan League at the Intermediate Division Three level. They dominated the intermediate divisions in the early 1980s, but were unable to gain promotion to the Senior Division until they gained senior status. At around this time, they played matches at the Meridian Sports Ground in Charlton.