STN
I am so surprised that Emirates have not announced or are even considering a Stansted flight, this would have EK operating from all of the major London airports covering the noth, south and west with STN having a large catchment area with not only north and east London but also Cambridgeshire and east Anglia.
There was talk a few years ago about EK operating an economy only flight into STN but surely with all this recent expansion especially ex UK and with all these aircraft on order surely a STN flight must be in the pipeline.
Plus the Emirates Stadium is just down the M11, well not far off anyway :-)