By Charlotte Tutton Emmerdale actress Olivia Bromley has spoken about the devastating scenes ahead on the ITV soap, as baby Evan is diagnosed with a serious illness. The youngster will be diagnosed with Acute Lymphoblastic Leukaemia in the coming weeks, leaving his parents Dawn Taylor and Billy Fletcher in turmoil. Soap boss Laura Shaw previously revealed the storyline, and how we would see the impact the diagnosis has on the family, and how it will turn their lives upside down. The ITV soap is working closely with the charity Leukaemia Care on the storyline, to ensure a realistic and authenti…