British Airways Boeing 747-436 G-BNLL preparing to operate BA34 Johannesburg – London Heathrow took a wrong turning onto an incorrect taxiway resulting in the right wing embedding itself into a building. All passengers were evacuated safely without injury. Four ground staff in the building are reported to have received minor injuries. The flight was cancelled. The aircraft is not one of those slated for withdrawal and returned from a major maintenance check at Cardiff-Wales on September 25th 2013.