Zookeeper Tony Cholerton explains why Jae Jae the Sumatran tiger needed a swimming lesson.
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19-year-old Angus Mainland took a selfie with his mystery traveler at the weekend. He fell in love. But forgot to ask for her number.
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.