Cathays railway works the Cardiff Valleys Division, under the Loans and Guarantees Act (1929): the track layout was improved; a new corrugated roof installed; and a new ramp added to the GWR standard-pattern single-road coaling stage. By 1950 under British Railways, the combined depots of Cathays and Radyr (Code:88A), had a complement of 82 locomotives, all tank-types: 2x2-8-2T; 62x0-6-2T; 15x0-6-0T; 3x0-4-2T. In 1959 the shed was divided to cope with the introduction of diesel multiple units. In 1961 the shed closed to steam, and all steam locomotives were moved to Radyr. The shed closed completely in November 1964, with the opening of the
Cathays Park 1927 part of the East range, with the lecture theatre funded by William Reardon Smith, was complete. Further extensions came only in the 1960s and '90s; these remained faithful to the original design on the exterior (and included sculpture by Dhruva Mistry) but are of a neutral character on the inside. Due to presence of the then Welsh Office building, by the 1990s 'Cathays Park' became a metonym for that Government Department. In addition to the large lawn in front of the City Hall, Cathays Park includes three formal gardens. All of the spaces are within conservation areas and many