Constructive feedback from staff or students is always welcome.
Informal comments and suggestions can be made by anyone to the UG3 Course Organiser at any time. The classes elect some Class Representatives, who act as a channel to the Course Organiser on class-wide issues.
More formally, Staff-Student liaison meetings are held once per semester, normally towards the end of semester. Items for the agenda are submitted to either the Course Organiser or the Class Representative. Minutes of these meetings will be available on the web.
Complaints can be made confidentially: for example, if you complain to the Course Organiser about a lecturer failing to mark work on time, the Course Organiser will take the matter up with the member of staff without divulging your identity. (If the lecturer concerned is the Course Organiser, you may address your complaint to the Director of Teaching.)