Imperial offers a range of free online courses. You can take them for interest, as a refresher or to support your degree. Access the courses by signing up to the relevant platform.
To take a course on edX for free, simply sign up using the ‘Audit this course’ option. On Coursera, select ‘Enroll for free’ and, depending on the course, select the ‘Audit’ option, the ‘Full course, no certificate’ option or the ‘Try for Free’ option.