๐ฌ๐ง How to Pay in United Kingdom
Contactless card payments are accepted almost everywhere in the UK, so cash is rarely needed. Download Citymapper before you arrive . it is far superior to Google Maps for navigating London's complex tube and bus network. Train tickets booked in advance through Trainline can be dramatically cheaper.
No specific payment app data available for United Kingdom yet. International cards and Apple/Google Pay are generally accepted.