By Jason Evans & Bradley Jolly A mum has been left with horrific injuries – including permanent scarring – after she was slashed across the face with a broken glass by a stranger in a bar. Natalie Arthurs, 36, says her life has been “changed forever” as she has been unable to return to work since the horror, and has abandoned her beloved role with the Army Reserves. A court heard her assailant, 25-year-old Emily Williams, smashed the glass she was carrying and attacked Miss Arthurs in the toilets of a bar. Miss Arthurs was dashed to hospital after the unprovoked assault, where she spent three …