In 1920, the house and its park entered public ownership, and this allowed for the site to be developed as a public amenity. Developments during the 1920s witnessed the introduction of public tennis courts, a rugby ground and a bowling green. A notable event was the Royal National Eisteddfod, which took place in the park in 1924. A bandstand was added in 1931, allowing the townspeople the opportunity to listen to music in the open air. A leisure centre and artificial ski slope were introduced in 1974.