Calendar year

Twelve months ending December (eg January 2011 to December 2011)

Terminal passenger

This includes passengers who are changing from one aircraft to another at the specified airport (transfers) as well as those starting or ending their journey.

Air transport movements

Landings or take-offs by aircraft engaged in the commercial carriage of passengers, cargo or mail.

Cargo

All goods (other than airlines' stores, passenger baggage and mail) loaded or offloaded at the specified airport. It is measured in metric tonnes (1 tonne = 1,000kg).

Types of service

Air transport movements (including the passengers or cargo thereon) at BAA airports are in some cases broken down into the following sub-categories:

• Domestic: Flights operating entirely within the United Kingdom, Isle of Man and the Channel Islands
• International: Flights operating to points outside the United Kingdom, Isle of Man and the Channel Islands.