Complex sentence: Lawley left "Tonight" on maternity leave shortly after its launch and did not return to the show, instead she rejoined "Nationwide" as one of the two main anchors, alongside Frank Bough.
Split into simpler sentences: Lawley left "Tonight" on maternity leave shortly after its launch and did not return to the show. Instead she rejoined "Nationwide" as one of the two main anchors, alongside Frank Bough.