White Muslim convert Richard Dart, 30, was jailed for six years at the Old Bailey today for terrorist offences. He refused to stand as he was sentenced.
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The creature was spotted in Hampstead Heath, the London Underground and the South Bank.
The problems appear to have been caused by a power supply problem in Queen's Park in north west London, which has affected signalling.
Cloudy conditions continuing overnight, with some patchy outbreaks of rain.