OK, so this is up to date – June 2010 – and is a review of the evidence around whether workplace counselling is effective. The conclusion is that, yes, it is but also that more research is needed:
“Taken as a whole, the results of research suggest that counselling is generally effective in alleviating psychological problems, has a significant impact on sickness absence, and has a moderate effect on attitudes to work”.
http://www.bacp.co.uk/research/Systematic_Reviews_and_Publications/Workplace.php
