Well, this information is posted on Newcastle Airports Charter Schedule section of their website:
NCL - Chania
TUE 0800-1815 7&14 MDI721 06/05/03-07/10/03 GOLDEN SUN HOLIDAYS
NCL - Corfu
FRI 2000-0425 7&14 MDI751 02/05/03-24/10/03 GOLDEN SUN HOLIDAYS
NCL - Faro
SAT 1300-2030 7&14 MDI763 03/05/03-25/10/03 STYLE HOLIDAYS
NCL - Kos
SAT 0800-1815 7&14 MDI731 03/05/03-18/10/03 GOLDEN SUN HOLIDAYS
NCL - Rhodes
SAT 1900-0520 7&14 MDI761 03/05/03-18/10/03 GOLDEN SUN HOLIDAYS
NCL - Skiathos
MON 0800-1840 7&14 MDI711 05/05/03-20/10/03 GOLDEN SUN HOLIDAYS
So it would seem that they are going to be operating a base, at least Fri-Tues.