Wednesday, 1 October was not a good day for London Underground.
Paddington signal failure about 0700 and "a person on the line" to
Hammersmith (Hammersmith & City) about 1100. Does that mean "one under"?

A train failure at Tottenham Court Road before 0700 resulted in no
Central Line service between Liverpool Street and Marble Arch until
about noon.
Alternative reports of emergency engineering works made me guess the
failed train hit something. Loss of the Central line seemed to overload
the westbound Jubilee. I boarded the fourth arriving train at London
Bridge about 0830. ;(

I suppose the day continued in kind.

The failure rate seems much lower than it was about 5 years ago. Double
failures are now rare. 40% delay improvement claims seem pessimistic.
--
Walter Briscoe