Roofly,
I have no particular interest in SOU except that, once upon a time, I worked for Air UK and SOU is my elderly mother's most convenient airport.
Just as an example KLM's smallest aircraft are F70's, I think with 84 seats, are KLM likely to fill anywhere near to 84 seats out of SOU, particularly, if in competition with the likes of LH, SAS, BMI, LOT, Iberia, Luxair, AF etc. etc. etc? These guys must be on drugs!
adfly,
Smaller airports such as BOH and Finningley? Smaller airports than SOU in what respect, dimensions of runway(s), parking ramps, terminal facilities, how are these airports smaller than SOU or do you really mean 'developing airports' rather than smaller airports?