Air Canada flight attendants have said they will remain on strike despite a government-backed labour board’s order to return to work by 2pm ET (18:00 GMT), which they described as unconstitutional.

The Canadian Union of Public Employees said in a statement on Sunday that members would remain on strike and invited Air Canada back to the table to “negotiate a fair deal”.

Canada’s largest airline now says it will resume flights on Monday evening. The strike was already affecting about 130,000 travellers around the world per day during the peak summer travel season.

The Canadian government on Saturday moved to end a strike by more than 10,000 flight attendants at the country’s largest carrier by asking the Canada Industrial Relations Board (CIRB) to order binding arbitration.

The Canad

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