S. London-Brussels is a surprise. If you are outside the immediate centre of London, except for the SE area, surely the train to Brussels is a long journey. Flying LGW-BRU could be quick & cheaper. BRU serves more than Brussels. I would have thought that the competition, i.e. train, BA, Brussels Airlines, RYR - CRL would have made ez LGW-BRU a sound operation, but they must have the data. Schedules can be all important. Perhaps ez didn't have a/c at profitable times.