Out of curiosity but seeing how easyJet don't pay any fees at Southend and they are about to have Ryanair as competition next year, it begs the question why for now they are not offering all these airports a service to Southend .
After all doesn't the new Crossrail link to Liverpool Street or close enough., Public transport in the capital by year's end is going to be pretty good.
It would prove if nothing else demand for London services , ok it's not direct but Crossrail had the Heathrow link, if they could work with the TFL or whomever operates Crossrail then perhaps some kind of through the ticketing as far as Heathrow.
Trouble is EZY are not linked unlike Flybe to the bigger carriers , so the onus is on the passenger to grab bags and hot foot it to wherever the connection is .
Time had come for them to join the club and be a star alliance member .