According to emails people are receiving via Ticketmaster, Aluna and George, aka AlunaGeorge, have cancelled their European tour.
The emails include the following message, which cites that old chestnut, "unforeseen circumstances":
"We’re sorry to announce that sadly, owing to unforeseen circumstances, we are going to have to cancel our European tour. We very much hope to come back and play for our fans in all these countries as soon as we can."
So there we have it.