Complex sentence: After graduating from the University of Glasgow, he joined the Royal Shakespeare Company in 1948 but first came to a wider public recognition playing "Jet Morgan" in Charles Chilton's radio drama "Journey into Space" on the BBC Light Programme.
Split into simpler sentences: After graduating from the University of Glasgow, he joined the Royal Shakespeare Company in 1948. However, he first came to a wider public recognition playing Jet Morgan in Charles Chilton's radio drama "Journey into Space" on the BBC Light Programme.