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
Fairwater High School Town. In 2015, as part of Torfaen County's 21st Century Schools Programme, Llantarnam School, one of the original Cwmbran New Town schools, closed and was merged with Fairwater High to form a new school on the latter site. It opened in September of that year as Cwmbran High School. Cwmbran High School is a large school that teaches a wide range of subjects. It is separated into five different blocks: Fairwater High School Fairwater High School (), now known as Cwmbran High School, is a state-funded and non-selective comprehensive school located on Ty Gwyn Road in the Fairwater district of