Politically, SFTU was tied to the Malayan Communist Party. The SFTU Central Executive Committee was dominated by Chinese MCP cadres. However, SFTU was able to recruit non-communist anti-colonial labour unionists amongst the Indian community. For example, SFTU vice president P. Veerasenan and leader of the Singapore Harbour Board Labour Union was a prominent Indian non-communist union leader. SFTU had virtually no presence amongst the Malay community.[2]
By mid-1947, SFTU counted with 72 affiliated unions, out of a total of 126 unions in Singapore.[1] The total membership of SFTU-affiliated unions stood at above 56,000.[1]
In 1948, the tactics of SFTU changed. SFTU initiated a number of strikes, including a general strike on 23 April 1948. These measures largely backfired, and after a call for mobilisations for 1 May 1948 the British authorities declared Emergency and clamped down heavily on SFTU.[1] After the ban on the Malayan Communist Party in June 1948, many SFTU unions were dissolved.[3]
SFTU was deregistered by the British authorities in December 1948.[4]