 | This article needs additional citations for verification. (July 2009) |
The London Underground and Docklands Light Railway (DLR) metro systems of London, England uses a mix of paper and electronic smart-card ticketing.
| This article needs additional citations for verification. (July 2009) |
The London Underground and Docklands Light Railway (DLR) metro systems of London, England uses a mix of paper and electronic smart-card ticketing.