British Airways cabin crew will have to return to ballot boxes once more, after the airline’s bosses said last month’s vote for strike action was “unlawful”. Unite, the union of the airline’s cabin crew, said the carrier had launched a “legal blitz” against the strike, leaving it no choice but to hold a fresh ballot. The dispute centres on action against staff who went on strike last year, including the removal of travel perks. “British Airways cabin crew voted last month overwhelmingly, and for the third time, to take industrial action against their employer on a number of issues relating to the company’s conduct of industrial relations,” said Len McCluskey, general secretary of Unite the union. “It was further proof, if proof were needed, of the fact that management at this blue chip British company has completely lost the trust of thousands of their key staff - loyal, professional and customer-facing. Since then, Unite has not heard a word from the company. Instead, BA has launched a legal blitz against the independent scrutineer used to conduct this ballot, the Electoral Reform Society.” Unite said BA had informed the Electoral Reform Society (ERS) that a recent ballot on industrial action was unlawful and that any action taken would be unprotected.