Many UCL departments will provide information about alumni, links with professional associations and typical career paths in the information they provide for prospective students. You can find this by specific degree programme or by subject area using the UCL Prospectus.
The UNISTATS website provides information about full or part-time undergraduate courses aimed at prospective students. This includes data for specific courses at UCL, including employment and destinations, student satisfaction and entry requirements. It also allows you to compare course data for different institutions.
UCAS also provide useful tips and advice for those considering studying at undergraduate level.
Your school, college or other current educational institution may also have support available on University options.
More general information on the Graduate Labour Market and employment trends for graduates or non-graduates is also published by the UK Government and HECSU, (the Higher Education Careers Services Unit).