Complex sentence: Studio 4 was constructed towards the end of the 1970s, the studio would be nearly double the size of Studio 1, and from the early 1980s onwards, would be home to the majority of RTE's large auidence based shows.
Split into simpler sentences: Studio 4 was constructed towards the end of the 1970s. The studio would be nearly double the size of Studio 1 and, from the early 1980s onwards, would be home to the majority of RTÉ's large audience based shows.