After a few pints, we reckon these six clocks in Canary Wharf probably get quite confusing. We always imagined they were something to do with the different financial trading centres in various time zones around the world. They're actually an art installation, imaginatively named "Six Public Clocks", by Konstantin Grcic, and have been in situ since 1999. The design is based on the iconic Swiss railway clock. On each of the 12 clock faces (each clock is double sided) the hands are in the same position, but each one has a different number on it's face. Another row of clocks, installed by artist Richard Wentworth, can be found nearby on Westferry Road. Dubbed 'Globe', these do show the time in different countries.
Yes, yes, we know. We missed Big Ben. Technically, that's the name of the bell, not the clock. More on that particular brand of pedantry here.
Photo sources: Canary Wharf by Andy Worthington, Fortnum & Mason by Guy Tyler, Shepherd Gate by Stuart Sunley, Swiss Court by NickyJameson, St Pancras by Chris Beckett, Bracken House by Check-in London, Covent Garden Water Clock by Matt, Blackburn Pavilion, Big Benzene and the Upton Park clock by Londonist.
Can't get enough of London's clocks? Our photo gallery has some more pictures of London's finest timepieces. What's your favourite London clock?
Video: See the Fortnum & Mason clock in action.