I'd also say that jet2 might find MAN a different proposition to LBA as they are pretty much IT at Leeds (LBA - PRG on a J41, Hmmmm)
.
There is far more competition at MAN and it seems that one route has already been canned (MAN - AMS) and it seems loads on the MAN - LGW haven't been sparkling; whilst the LGW route isn't quite esablished it also isn't entirely new. Jet2's advertising budget must be quite some thing as you can't move around the Greater Manchester area without seeing a hoarding or bus emblazoned with Jet2 adverts. Must cost a bit too.
Perhaps they should try BA's minimalist approach to advertising around Manchester and save some money; it seems to really work well
(not).