Yep, that's Thom Yorke, Phil Selway, Ed O'Brien, and Colin Greenwood in the late 1980s. Back then Johnny Greenwood wasn't yet in the band who were still called On A Friday. This photo turned up during research for a documentary Anyone Can Play Guitar, about the Oxford, England music scene that also spawned Supergrass, Swervedriver, Foals, and others.