Natalie Cassidy to leave EastEnders, three decades after first appearance as Sonia Fowler

Steven McIntoshEntertainment reporterBBCCassidy's exit storyline will coincide with the show's 40th anniversary in FebruaryActress Natalie Cassidy is to leave EastEnders, more than three decades after her first appearance on the soap as Sonia Fowler.In a statement the 41-year-old said she was "extremely sad" but also "very excited" to be moving on.Her exit storyline has not yet been confirmed, but the BBC said…