PN
I thought you might find the extract below from the EU directive useful:
1. When an operating air carrier reasonably expects a flight
to be delayed beyond its scheduled time of departure:
(b) for three hours or more in the case of all intra-Community
flights of more than 1 500 kilometres and of all other
flights between 1 500 and 3 500 kilometres
I believe Paphos is between 1,500 and 3,500 km from London and the UK and Cyprus are both EC members.