The on-line edition of 'People Management', published by the Institute of Personnel and Development now allows non-members to search for a variety of posts which have been advertised in the fortnightly magazine. Search categories can be refined by salary, location, job title, etc.

Go to http://www.peoplemanagement.co.uk/contents.html and click on the Jobs icon.

It's not very comprehensive yet, but this site is slowly building.