Aer Lingus has issued an update in respect of April 2014 trading and the threatened industrial action by the IMPACT trade union.
The group said the union's planned industrial action, which it described as unwarranted and deliberately timed to occur before the seasonally-important June bank holiday weekend, has considerably damaged its forward booking profile.
Management's current assessment is that the adverse effect of the strike called for 30 May will offset the potential revenue gains which would otherwise have been realised by Aer Lingus.
IMPACT has also indicated to the airline that it will issue further notice of industrial action in due course.
The dispute is related to cabin crew roster arrangements, which the union wants changed to bring it more in line with those worked by pilots.
For the month of April, Aer Lingus said that it traded positively; with its short haul, long haul and retail businesses all performing strongly in the month.
Even allowing for the timing of Easter, the airline said total revenues generated in the month were substantially ahead of last year's and its operating result for the period was significantly ahead of management's expectations.