 As the deadline passed the airline initiated the action to implement the changes angering Trade Unions representing the majority of Aer Lingus employees.On June 17, the airline agreed to allow a ballot for up to two weeks for its pilots for changes to work practices and recovery of salaries.Aer Lingus was listed on the Irish and London Stock Exchanges, under ticker EIL1 on the Irish Stock Exchange and ticker AERL on the London Stock Exchange.