Gorillaz’ huge London show at The O2 last summer for NHS workers.Now, on October 20, it will go under the hammer as part of the Bonhams Pop X Culture auction at New Bond Street in London, where it’s expected to raise between £5-7,000 for Brian Eno’s climate change charity EarthPercent.Claire Tole-Moir of Bonhams said in a statement: “Both Robert Smith and Gorillaz are true innovators and pioneers of new music, and we are thrilled to be able to work with them by offering this unique customised guitar in aid of Brian Eno’s charity EarthPercent. To be able to own a one-of-a-kind guitar that is both a piece of art and a piece of music memorabilia is already a rare opportunity, but to be able to support EarthPercent’s ongoing campaign of tackling climate change at the same time, is very special and exciting for collectors and fans alike.”EarthPercent added: “We are thrilled to offer this gorgeous, signed guitar so kindly donated by Gorillaz and Robert Smith to EarthPercent.