It comes after the firm said an accounting probe found thousands of false entries in its ledgers.
Viagogo insists it has improved its practices but campaigners say it is failing to comply with the law.
The airline cuts its forecast, blaming a fall in air fares and over-capacity on short-haul routes.
The collapse of plans for a new nuclear plant in Anglesey is just the latest blow to the industry.
Which one shortens our life expectancy more?
Sign up for our newsletter