In 1912 Thornycroft Athletic joined the North Division of the Hampshire League but in their first two seasons they twice finished bottom but were re-elected each time.

[1] When normal football resumed after World War II, Thornycrofts returned to the Hampshire League and were placed in Division 1.

The post-war era saw the club remain a steady force in the league and were regular entrants in the qualifying rounds of the FA Cup but relegation in 1950–51 saw a decline in fortunes.

[2] Back in the top flight, Thornycrofts became a powerful force and after some encouraging seasons they won the title in 1968–69, three points clear of local rivals Basingstoke Town – with whom they fought many an epic battle, often in front of large crowds.

[3] In 1969, the parent company relocated to Watford but the football team continued, enjoying further successes, but this was brought to an abrupt end in the summer of 1972 when the sudden loss of their ground forced the club to withdraw from the county league and fold.