Not sure if anyone is a fan of their work but I follow them in facebook / email updates and they're touring next year in Europe which includes 5 dates in the UK. The link below is a link to their presale which is now live. I've just got tickets for the Wolverhampton gig and I think that at least one set of presale tickets for London's Brixton Academy have gone but you could always sign up to email alerts and I presume they go on general sale on Friday.[
www.sigur-ros.co.uk/presale
www.sigur-ros.co.uk/presale