On 3rd March 2006, Simon Pope and guests walked from the line of the Prime Meridian at Greenwich to The Foundry in Shoreditch, 'talking the time' with them as they went. Moderated by the 'body clock' and movement of the walkers, this time then became the standard time that the radio station used for its live radio broadcast.
A NODE.London event: http://www.turbulence.org/blog/archives/002187.html
The group of walkers at the Greenwich Observatory (GMT clock depicted to the right) (2006) Photo:
Delivering the 'time signal' to a live radio broadcast of The Late Late Breakfast Show at The Foundry in Old Street, London (UK) 2006