Doesn't surprise me and no doubt the airport will blame the building work when the truth of the matter is that the airport has not put a cap on passenger numbers.
Southend is number one because it is under utilised but no doubt wishes it was in Luton's position of operating way above capacity.
Being bottom of the table is having no effect on numbers at Luton and being number one doesn't seem to be having much effect on Southend either.