I don't really see the need for Jet2 to operate this route. The company doesn't have the brand visibility in London that they do in the north, so few Londoners would probably consider Jet2 for a trip up to Manchester. Also consider that BA have regular flights to MAN from LGW/LHR with onward connections, bmi serve LHR & VLM are doing LCY. Throw into that the far improved train connections between the two cities, and you have to ask why Jet2 are trying to compete.