The volcano threat has now passed and planes are allowed to fly freely again, as far as I know. It will take a while to get back to normal. But it is too late to save the Alan Wake event that was being organised by GameCity.
The event, which was to be held on 24th April as part of ScreenLit: Festival of Film, TV and Writing at Nottingham Broadway, was to be the first UK public Alan Wake event. Sam Lake, lead writer on Alan Wake, was unable to make it into the country in time and the event has now been cancelled.