Online job search offers the fastest way of finding currently advertised vacancies both on a national and regional basis. There are dedicated job search sites which feature thousands of vacancies from both recruitment agencies and employers. Alternatively you can visit the actual sites of recruitment agencies as well as those of employers.
The key to maximising the power of online job search lies in knowing from previous research, firstly, the type of employer you wish to work for, and secondly, the type of job that matches your personality and preferred workstyle. The first aspect is covered in this job search section in our "Researching Employers" page. The second aspect, on matching careers with personality is dealt extensively in the careers advice and psychometric test sections of this site.
It is well worth targeting the sites of specialist recruitment agencies in your chosen field. Specialist agencies have a much better record of delivering the right candidates to employers.
When you identify a job(s) you wish to apply, there should be instructions on how to directly apply online. Many good job search sites in the UK additionally offer online CV posting on their database, available for viewing by recruiters and employers. This service is invaluable, making your profile visible to thousands of recruiters and employers. Sites also typically email candidates details of jobs that match their CV profiles.