The Stonehenge market is handled by excursion coaches, some of which go on to other locations as part of a complete day itinerary. The idea that people would take a 'normal' coach isn't really realistic.The 511 would be a perfect draw if ran at the correct times for the morning stonehenge Market out of London
why not spend time advertising what you have to offer prior
I suspect National Express do have a marketing effort but it is not in the traditional places. I get Megabus adverts on the Facebook feed and National Express adverts in the 'advertising bar' on websites. Does that not count as marketing? It isn't just about billboards or local newspapers.