sentences:  Penarth's town rugby pitch had been dug up and used for growing vegetables by local residents during First World War food shortages, so between 1919 and 1924 the traditional annual Good Friday rugby matches between Penarth RFC and the Barbarians were staged instead on the grammar school's playing field, when most of the town's population turned up to watch and cheer.In the autumn of 1924 the new Athletic Ground on Lavernock Road, a gift to the town by the Earl of Plymouth, was opened and the Good Friday matches were moved to their new home the following year.In 1960 the previously segregated sexes were combined into a co-educational school that was renamed as Penarth County Grammar School but the increasing school population had far expanded beyond the available accommodation and a large number of temporary "portakabin" buildings were added and increasingly built across the original playgrounds and playing fields.