The country, or "-Total Network Manager Area" for the whole network.

The day the figures cover.

The number of IFR flights for the country on the day.

Minutes of airport arrival ATFM delay on the day.

Minutes of ATFM delay caused by limited aerodrome capacity (delay code G).

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 airport arrival ATFM delay per flight on the day.

Average minutes per flight of ATFM delay caused by limited aerodrome capacity.

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 airport arrival ATFM delay on the comparison day in the previous year.

Average minutes of airport arrival 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.