This study monitors the efficacy and safety of Golimumab in maintaining deep remission and quality of life in Ulcerative Colitis patients in deep prolonged remission with Infliximab. Patients will be followed up for one year and they will be assessed with biochemical tests (C-Reactive Protein , Full Blood Count , Faecal Calprotectin),endoscopic evaluation (MAYO Score) and finally histologically.