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Pocket map; combined Underground and London BR lines map with travelcard zones, March 1996 | London Transport Museum
![fees and charges - When we travel to Zone 4 in London with an Oyster card purchased for Zone 1 and Zone 3, how are the fares calculated? - Travel Stack Exchange fees and charges - When we travel to Zone 4 in London with an Oyster card purchased for Zone 1 and Zone 3, how are the fares calculated? - Travel Stack Exchange](https://i.stack.imgur.com/QEo93.png)
fees and charges - When we travel to Zone 4 in London with an Oyster card purchased for Zone 1 and Zone 3, how are the fares calculated? - Travel Stack Exchange
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