Strikes action is taking place on the London Underground today.
Drivers in Aslef and the Rail, Maritime and Transport union will strike in a dispute over pensions and conditions.
Transport for London's website shows no services are running on any Tube lines.
Meanwhile, there will be no Chiltern Railways services between London Marylebone and Aylesbury via Amersham today.
The rail company says customers seeking to travel between London and Aylesbury can do so via High Wycombe.

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