Southend is operating at one third capacity. If Luton was operating at one third capacity then Luton would have a mere 4 million passengers based on an acknowledged capacity of 12 million passengers rather than the 15.6 million it has today.
Southend's equivalent of Luton would be nearly 4 million passengers operating through a 3 million capacity Southend so when folk here say well done Southend they are comparing successful with unsuccessful not that Luton has anything to shout about.