Yes, they announced this on their blog last week.

I'm sure the girls are very tired, but you know, every year at Tribalondon & Raqs B it's been the same girls - Moria, Kami, Samantha & Sharon (though I love them all, they're all marvellous teachers) - and the same girls on every tour for the past couple of years (I know they have others join them in the US, but in Europe its certainly been the same girls) - so no wonder they would be tired!!! But, i'm sure if that was the reason, no one would mind.

But that's not the reason - apparently it's something to do with the venue. Everyone would be more accepting of this cancellation if they hadn't announced the dates already, and people hadn't made arrangements to come from all over Europe - remember, that's accommodation, travel expenses. These things are an expensive business and we like to plan ahead to save a bit of money - sadly it now means some people have now lost that money.