Complex sentence: Nick Bates first arrived in Beckindale in 1985, to visit his mother Caroline, whom he hadn't seen for a couple of years as they had become estranged, due to Nick's constant fighting with his alcoholic father, Malcolm.
Split into simpler sentences: Nick Bates first arrived in Beckindale in 1985, to visit his mother. He hadn't seen her for a couple of years as they had become estranged, due to Nick's constant fighting with his alcoholic father, Malcolm.