| Your weekly Londonist roundup, featuring Londony news and features from the past seven days. Tunnels, bridges, trains and more. From the Olympic Park to a theatre in Hornchurch. London Marathon runners and spectators could be affected. Track down dozens of globes. The truth resides near Penge. An immersive theatre and music production, only in London for three weeks. (Sponsor) The writing's on the wall. Tis witchcraft I tell thee! Know about the 650 million-year-old sculpture? Our new competition with Frameless. (Sponsor) Photograph: Jordan Curtis Hughes Banksy, Brunel, and beyond! 50th of its name. The best venues for concerts in the capital. | 