http://www.bbc.co.uk/news/uk-england-london-14804863

---quote---
Thousands of commuters are suffering delays after signal cable was stolen
near one of London's busiest stations.

About 9m (30ft) of cable was ripped out in the early hours near Millwall's
football ground in south-east London.

Network Rail said the theft would cause severe disruption all day on
Southern and First Capital Connect trains to and from London Bridge station.

British Transport Police (BTP) are investigating the theft, which was
reported at 02:48 BST.
[...]
A second cable theft of the night took place at Littlehampton, causing
delays across a large part of Sussex.
[...continues...]
---/quote---