The area control centre (ACC).

The country the entity belongs to, or "-Total Network Manager Area" when the row is part of the network total.

The day the figures cover.

The number of IFR flights through the area control centre on the day.

Minutes of en-route ATFM delay on the day.

Minutes of ATFM delay caused by ATC capacity or staffing (delay codes C and S).

Minutes of ATFM delay caused by ATC disruptions such as industrial action or equipment failures (delay codes I and T).

Minutes of ATFM delay caused by weather, including de-icing (delay codes W and D).

Minutes of ATFM delay from all other causes.

Average minutes of en-route ATFM delay per flight on the day.

Average minutes per flight of ATFM delay caused by ATC capacity or staffing.

Average minutes per flight of ATFM delay caused by ATC disruptions.

Average minutes per flight of ATFM delay caused by weather.

Average minutes per flight of ATFM delay from all other causes.

The day in the previous year used for comparison, chosen as the closest similar day of the week (364 days earlier).

Minutes of en-route ATFM delay on the comparison day in the previous year.

Average minutes of en-route ATFM delay per flight on the comparison day in the previous year.

Whether the row is a day published in the daily file, or an earlier day rebuilt from that file's comparison columns, which carries only the compared values.