The British Airline Pilots' Association (BALPA), the airline pilot's union, has opposed government plans to trial ID cards in the airline industry.
On Friday November 21, ministers are expected to publish draft regulations to set up a trial requiring air side staff at Manchester and London City airports to sign up for an ID card before they can get security passes to work there.
BALPA General Secretary Jim McAuslan, said, "We have explained time after time why the ID cards will not improve airport security. The government is just seeking to use our members as guinea pigs."
BALPA will be running its annual conference at Heathrow this coming weekend, where the union will discuss its reaction to the government's ID card policy.
"If the regulations are approved, and if pilots who refuse to register for an ID card are thereby denied access air side to their aircraft, putting their jobs at risk, there will be widespread anger," McAuslan said.
"We want to avoid an industrial dispute, we want the government to think again. We are consulting our lawyers and will determine our future action."