Time is a big deal in the London area. Has been for centuries, since Britannia ruled the waves, and still is.
There's Big Ben in the clock tower at the Palace of Westminster:
(If that video is too blurry, try this one:)
There are the Harrison timepieces at Greenwich:
(If you don't know why the Harrison timepieces are so important to history, go read this book now.)
The time ball at Greenwich: