Trains starting at Southend Victoria will have plenty of room on them by the time they get to Southend Airport which will be the second stop on the line. Those coming from London should be OK until the afternoon rush.
FYI most of the hoodies probably walk to the seafront after they have been to the post office in the high street to get their cash
You should really control your anti Southend sentiments. I notice you come from Colchester, whats so special about that?