NCL's website
Their website (not always the most up to date, but nevertheless) is reporting:
Following yesterday's announcement by the Department for Transport regarding possible closure of UK airspace from today (Sunday 16 May) until Tuesday 18 May, we confirm that Newcastle Airport remains open for inbound and outbound flights. An announcement by National Air Traffic Services this morning does not at this stage indicate any closure of the airspace around Newcastle.We are, however, experiencing some cancellations and delays due to the situation elsewhere. Customers planning to fly to one of the affected areas should check with their airline before setting off to the airport. Graeme Mason, Head of Planning and Coporate Affairs said " At the moment Newcastle is not affected by the higher density ash.The majority of flights are operating as normal, although we are now experiencing some disruption due to the situation in other parts of the country. As the no fly zone extends to several other airports around us, we are now handling a number of diversions".