Will that overpriced nonsense the London 2012 Festival never end? 2000-year-old Hadrian's Wall is the next British monument to receive a Festival makeover. American art collective YesYesNo has been commissioned to tether 400 6ft-diameter weather balloons lit by thousands of light emitting diodes along the 73-mile stretch of Hadrian's Wall. It is claimed that Connecting Light will be the world's longest work of art. It lights up on Friday 31 August and Saturday 1 September (CLICK for best viewing spots). Shown is a public domain photo of Hadrian's Wall at Greenhead Lough, Northumberland, by Velella (2005).