Ian Jelf wrote:

Beck's Law: District/Metropolitan/H&C Line Trains come when waiting for
a Circle Line Train; Circle Line trains come when waiting for a
District/Metropolitan/H&C Line Train.

Beck's second law: if you change from District to Piccadilly at Barons
Court Westbound, at least two Ealing Broadway trains will reach Acton
Town before an Uxbridge train turns up.

If you don't, one will overtake you.

Colin McKenzie

--
No-one has ever proved that cycle helmets make cycling any safer at
the population level, and anyway cycling is about as safe per mile as
walking.
Make an informed choice - visit www.cyclehelmets.org.