CAMRA, the Campaign for Real Ale, is calling on Jennings Brewery shareholders to reject a bid by Wolverhampton & Dudley Brewers.
CAMRA believes Jennings can say no because it is a successful regional brewer, recording a 13.4% rise in profits for the last financial year.
Mike Benner, CAMRA’s chief executive, said: “Any bid will be bad news for consumers and employees, but also for Cumbria, which faces the loss of a unique local brewer.”
Jennings’ MD Mike Clayton said its shareholders were set to welcome a formal offer.
He said: “We understand the sentiments by Camra but business just isn’t like that.”