The World cup match and the missing laptops
Pretty sure it was the 2010 World Cup, England v Germany match.
A large consultancy beside the River Thames, next to HMS Belfast.
An entire floor got cleaned out of laptops people had in their desk drawers and whatnot - the security guards in the building had all decided to sit in one room and watch the football and didn't notice someone jemmy open the pedestals and walk off with over 20 laptops.