
Many jobs are advertised in the local and National Newspapers, many in free papers and others in job hunting papers.
The national press often carries vacancies for a particular occupational area; e.g. the Guardian has Educational Vacancies on Tuesdays, with other professions and occupational areas on other days of the week. This is equally applicable to other papers.
TIP: Most of the newspapers have web sites, and some carry vacancies online. Use a search engine to locate them, or try www.NEWSPAPERNAME.co.uk or COM, it works most of the time.
Many employers will advertise in local and national papers, but not in the Job Centre, so it is a good idea to keep looking at these too.
Many UK professional associations have their own journals, periodicals or magazines. Employers will often advertise in these to recruit professionals for their company. So if you are a member of an international association and receive such a publication it may be a useful starting point to go to the employment section and checkout the vacancies.
If you are a recently graduated student, then subscribe to a professional UK journal, they often have reduced rates for student members and it will considerably increase your job hunting prospects.