Not due to safety concerns, but changes in strategy which this trial no longer fulfills.

To explore the safety of FE 999322 (microbiota suspension) and FE 999324 (microbiota capsule) versus placebo in subjects with active mild to moderate ulcerative colitis (UC).

Inclusion Criteria:

• Subject aged ≥18 at screening
• Established diagnosis of ulcerative colitis by standard clinical, endoscopic and histological criteria, for more than 3 months at screening

Exclusion Criteria:

• Active disease or history of Crohn's disease
• Active disease or history of irritable bowel syndrome (IBS) or any other chronic intestinal disease apart from UC
• Active gastrointestinal infection.