There are no night time flying curfews at any of Northern Ireland’s airports. However, at George Best Belfast City airport, a planning agreement exists to control, among other matters, air traffic movements. Under this agreement, flights are prohibited between 21.30 and 06.30, however, an extended operating period (from 21.30 to 23.59) permits delayed flights to complete their journeys. In the past 12 months there were only two emergency medical flights, in June 2006, outside the planning agreement and therefore no action was taken.