© Licensed to London News Pictures. 09/07/2015. London, UK. Commuters arriving Waterloo train station on overground trains as tube strike shuts down the entire London Underground network on Thursday, July 9, 2015. The strike called by RMT, TSSA and Unite unions is a 27-hour stoppage by about 20,000 Tube staff and shuts down the entire London Underground network. Photo credit: Tolga Akmen/LNP