I went to see this excellent public lecture at the IET (Institute of Engineering and Technology), given by the Curator of Timekeeping at the Royal Observatory. The presenter was clearly passionate about the subject and was full of interesting anecdotes and stories.
The lecture is online as a webcast (see the panel below) and well worth watching. It’s nearly two hours long including the questions, but if you are going to ever spend two hours watching a lecture, this is the one.
Time by Wire: 175 years of the Greenwich Time Service
The Wheatstone Lecture 2008, London, UK
2008-12-03 05:33:48.0 News Channel
(Note – the slides don’t show correctly if viewing with Safari, it works fine with Firefox though.)