Unless you live in a SS postcode I can't see them hurting LCY, STN or LTN. Even the airports own published catchment area is not very large.
As an overflow this is good but they have missed the boat as far as 2012 and time will tell. I'm sure the business plan will benefit the owners investment.
Shall I still be able to land a Cherokee in between the EZY & RYRs, I think so...