Aer Southeast - which will operate from Waterford - has suspended ticket sales while it 'resolves the issue'
A new Irish airline has had to temporarily stop selling tickets for flights after it was found to be selling tickets without a tour operator licence.
Aer Southeast last week announced it will fly from Waterford to London Luton, Manchester, and Birmingham.
The service to the UK capital will run six times per week, while the other services will fly three times each week.
Services are due to begin on Monday, July 24th.
However, the Commission for Aviation Regulation (CAR) says Aer Southeast did not secure the legally required tour operator licence for the new services.
In a statement, the commission said: "As soon as the Commission became aware that Aer Southeast intended to arrange and offer for sale a new service, we issued a letter to Aer Southeast to cease trading and provided the company with the relevant application forms to apply for a Tour Operator Licence."
The commission said it is still awaiting an application and will process it as soon as it is received.
Meanwhile, the airline is assuring anyone who purchased tickets that their money is secure, and they hope to have the situation resolved shortly.
A spokesperson said: "We wish to assure them that we will be doing everything possible to ensure that we are in a position to begin our scheduled flights as already announced.
“We also hope to have our website booking facility restored in the coming days."
The statement adds that 'significant progress' has been made in resolving the issues raised by the CAR.