© Licensed to London News Pictures. 11/08/2017. London, UK. A tower block on the Ledbury Estate. Residents on the Ledbury Estate in south London have been told they will have to leave their properties over the next few weeks. A structural survey carried out after the Grenfell fire found cracks that could lead to a collapse of the building if a gas explosion occured in one of the flats. Photo credit: Peter Macdiarmid/LNP