Looking at the new online scheduled services timetable, a number of flights are cut for a few weeks, including:
ZB Alicante Mon/Wed/Thu
ZB Almeria Sat
EZY Bordeaux Tu/Th
EZY Cagliari Th
FR Dublin (various)
ZB Arrecife Mon
ZB Malaga Tu/Wed
EZY Nice Tu/Wed
ZB Tenerife Th
Most re-start in early February, in time for half term. I suppose it's common sense really.