Opened on 1 March 1942 (1942-03-01),[1][2] it gradually replaced the Cardiff tramway network.

Trolleybuses are electric buses that draw power from dual overhead wires using spring-loaded trolley poles.

By the standards of the other now-defunct trolleybus systems in the United Kingdom, the Cardiff system was medium-sized, with 14 routes and a maximum fleet of 79 trolleybuses.

203 is at the Trolleybus Museum at Sandtoft, Lincolnshire, England.

Media related to Trolleybuses in Cardiff at Wikimedia Commons