Complex sentence: Many positions in the House of Commons do not allow employees to dress outside of uniform but have compromised to allow staff to wear a red ribbon instead this is the only exception other than wearing a poppy for Remembrance Day.
Split into simpler sentences: Many positions in the House of Commons do not allow employees to dress outside of uniform but have compromised to allow staff to wear a red ribbon instead. This is the only exception other than wearing a poppy for Remembrance Day.