well, that's a shame for the fans in the UK. One of the reasons why the fans were asked to turn out for the shows was because the promoters weren't doing much publicity - or perhaps didn't see the need to do much publicity.
We see it here, too. There was a very nice jazz festival last year - it was the first year for the fest. A couple of the boarders (not mentioning your names

) were there, along with long time fans from the area. In concept, the festival was a great idea - and the sound and the lighting were fantastic.
But there weren't that many people who attended just to attend. The ticket price was high and the place just wasn't easily accessible. While there was much community support & involvement, there wasn't much community attendance. It could have been because it was August - but I've seen a lot of 1st year festivals - it takes time to build up that core fan base. In the meantime, there are many empty seats.... I don't know if that festival will come back this year as there were more bills than incoming cash flow.