Radiohead: The boys are back - creative, contrary and with a point to prove This tour, their first in four years, is belated support for their last album, 2011's King of Limbs, which had, like its groundbreaking predecessor, been self-released to fans online - although unlike In Rainbows, with a fixed price. While this strategy was brilliantly successful in 2007 - In Rainbows entered the UK and US charts at number one - King of Limbs failed to make the same impact, becoming Radiohead's lowest chart entry since their debut album. This year marks the 20th anniversary of the release of the defining single Creep, and the band members, all on the cusp of middle age, have made no bones about being hell-bent on reinventing their own music-making wheel. However, what this means in practice is hard to judge from a band built on utter contrariness. Since Creep became their Generation X anthem - a perfectly formed, anxiety-ridden, British response to the nihilism of American grunge - the band have been on persistent retreat from the creative trajectory of many of their contemporaries, while enjoying a place of hefty influence beyond the underground. In fact, it is the disappointment that King of Limbs failed to reach more people that has drawn them out on the road. An introverted, glitchy album indebted to sampled, electronic textures, their eighth work is an ode more than anything to flux. While that makes it a tricky, unsatisfying listen on record, it could prove something special live. Bolstered by a sixth member, Portishead's drummer Clive Deamer, the open-ended possibilities of this album have invigorated the band, confirmed by enthusiastic reviews from America. While they still might not be out to please, Radiohead's attempts to keep themselves interested remain compulsive listening. Radiohead tour from Sat to Oct 9; www.radiohead.com