Oyster card scheme extension agreed - BBC News
You can now top up your Oyster card 'on the go' - London Post
New TfL app enables mobile tops up of Oyster cards
Oyster card top-up scam costing commuters thousands | Metro News
Transport for London delays Oyster card top up machine installation in Brent Cross shopping centre for second time | Times Series
Cracking open the story of London's Oyster Card - Future Rail | Issue 80 | December 2019
How Long Does The Oyster Card Have Left? | Londonist
Oyster card - Wikipedia
How TfL got £321m from commuters without doing anything at all | The Independent | The Independent
Easier to Top Up Oyster
TfL Oyster and contactless by TfL (iOS, United Kingdom) - SearchMan App Data & Information
How to Auto Top Up a child's TFL Zip Oyster Photocard
How to Auto Top Up a child's TFL Zip Oyster Photocard
TfL Oyster and contactless - Apps on Google Play
You Can Now Collect Your Oyster Card Top Up On A Bus | Londonist
TfL Oyster and contactless - Apps on Google Play
New TfL App allows You To Top Up Your Oyster On The Move | Londonist
TfL Have Launched A New App To Keep Tabs On Your Oyster - Secret London
New TfL app enables passengers to top up their Oyster card 'on the go'
London Underground: TfL lowers minimum Oyster card automatic top up to tackle cost of living crisis - MyLondon
