Punctuality slipped quite significantly for all charter airlines in summer 2004 (from previous summers), but TCX still hung on to 2nd position overall (Britannia / Thomsonfly were 1st).
Notably TCX dropped to 3rd position behind Britannia and First Choice in the recent winter 2004 / 2005 season (your flight is officially in the winter season).
See
www.flightontime.info under "Charter Airlines". Watch out on that site around Jan 2006 when the Summer '05 results are published.