Queensland craft brewer Green Beacon has been booted out of the national organisation overseeing the interests of hundreds of small craft brewers as that same group raises concerns with the competition regulator about Asahi's looming $16 billion buyout of Carlton & United Breweries.

Green Beacon was acquired by Asahi on August 21, just four weeks after the Japanese group unveiled a much larger $16 billion buyout proposal for Australia's biggest beer company, CUB, owner of mainstream beer brands Victoria Bitter, Carlton Draught and Great Northern.