Excellent news on the passenger loads. 84,792 is incredibly exciting for Southend. They haven't seen these kinds of numbers in their history, ever! There were some entire years that went by in the 90's with less than the July total.
Southend, being marketed as a London gateway and an alternative for those who despise Stansted, not to mention the immediate catchment area, should easily be able to support 200-250,000 passengers a month once the extension is available in my opinion.
The best days are still ahead for Southend.