The Red Flag Labour Unions was a

trade union A trade union (British English) or labor union (American English), often simply referred to as a union, is an organization of workers whose purpose is to maintain or improve the conditions of their employment, such as attaining better wages ...

movement in

Burma Myanmar, officially the Republic of the Union of Myanmar; and also referred to as Burma (the official English name until 1989), is a country in northwest Southeast Asia. It is the largest country by area in Mainland Southeast Asia and ha ...

, linked to the Red Flag Communist Party. On 3 July 1946, the British governor of Burma Sir Henry Knight banned the Red Flag Labour Unions and the related Red Flag Cultivators Unions.Hensengerth, Oliver.
Burmese CP in relations between China and Burma
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References

{{Trade unions in Myanmar navbox Communism in Myanmar Trade unions in Myanmar