NATS has advised that the dense cloud of volcanic ash has moved west and has now cleared UK airspace, allowing flights from Northern Ireland and Scotland to resume.
In an update at 0445 today (May 6) it said:
"The no-fly zone imposed by the Civil Aviation Authority tracking the high density area of the volcanic ash cloud, has moved west overnight and has now cleared UK airspace.
"According to latest information from the Met Office, from 0700 (local) today (Thursday) all UK airfields will be available.
"We continue to maintain close dialogue with the Met Office and with the CAA, which is responsible for imposing no-fly zones. We will issue any further notice as necessary."
Bmi says that all of its mainline and Bmi Regional flights will operate as normal today, Ryanair says it will operate all flights, except to and from Kerry (until 0850 when they will resume) and Shannon (until 1000).