A new campaign is demanding the federal government halt any changes to Billy Bishop airport until Toronto residents are properly consulted on a detailed plan for the controversial expansion.

“Our city’s Inner Harbour is truly a crown jewel, one of our greatest civic achievements,” reads a letter signed by 28 prominent Torontonians, including author Margaret Atwood, theatre producer David Mirvish and Olympic gold medallist Hayley Wickenheiser, sent this week to Prime Minister Mark Carney, Minister of Transport Steven MacKinnon and Housing and Infrastructure Minister Gregor Robertson.