TfL still uses UTS in modified form and hugely reduced quantities, as detailed in Wikipedia. Decoding vital info centrally on the right hand side, machine series starting 01 upwards related to now-closed staffed Ticket Office windows; 10 onwards relate to self-service Fewfare machines; series 31 etc comprise a complex Multifare variant.
Holborn 01 - UTS London Underground ticket is best for those looking to travel on London's iconic transportation system, specifically aiming to explore the city's urban and historic districts, including WC2B.
