Tagron is right.
Some of the very residents that complained about using this area for a drop-off/bus interchange, are now complaining at the £3 charge to drop off/pick-up up at what was until recently, their most convenient railway station to commute to work etc. One could hope that some of the original plan is revisited to allow a free car drop off zone again to the east of the railway, or at least pedestrian/bus/coach access. The ticketing & access arrangements at the rail station would need work doing to accommodate this.
Does anyone remember the "SERT" South Essex Rapid Transport system that was once proposed, using this green space with a dedicated bus lane in and out of Southend town from the airport? It would certainly be good to have the No 7 and 8 buses offer direct connectivity to the airport.