Drop offs are easy with the free ten mins in short stay.
Pick ups are always the problem as people usually arrive about an hour too soon ..
Ok if your getting to an airport from an hours plus drive away you don't want to be late.
But Southend has plenty of places to lurk if your early, that are less than five mins away and won't attract the disapproving eye of some business park 'parking' warden ..
flight radar, and your eyes can do the rest