© Licensed to London News Pictures. 01/03/2012. LONDON, UK. Broadcaster Jon Snow celebrates reaching the top of Tower 24 at Shelter’s Vertical Rush, the UK’s biggest tower running event in the City of London.  Today (01/03/12) a host of celebrities joined 1,200 people to run up the 920 steps of Tower 42, raising £250,000 for housing charity Shelter. Now in its fourth year, the award-winning Vertical Rush will once again take place at London’s original skyscraper, Tower 42. Photo credit: Matt Cetti-Roberts/LNP© Licensed to London News Pictures. 01/03/2012. LONDON, UK. CAPTION HERE. Photo credit: Matt Cetti-Roberts/LNP