and what about the inbound passengers?
If memory serves, increased inbound traffic from the UK was the main selling features given by the airport for encouraging one of the big two LCC's to serve the IOM.
Looking at the figures since Easy launched their service I would say that has not been the case, they have merely taken traffic from the Steam Packet, BPL, LBA etc. I also doubt if there is 140 odd people daily in the southeast of England suddenly planning a visit to the IOM because of cheap fares from Easy on the LGW route.