I'm not sure that the addition of the DART is going to make it any more appealing for people going to / coming from from the City of London. I would say all the other airports are easier from the City, although there's not a huge difference. And what flights would be they leaping onto anyway? It's hardly a business airport.
But i totally agree about it being a relatively stress free and efficiently run airport compared with the alternatives.
But i totally agree about it being a relatively stress free and efficiently run airport compared with the alternatives.