ACAS - the UK's Advisory, Conciliation and Arbitration Service provides impartial free advice to employers and employees regarding employment law.  Continuing on the theme of mental health awareness I stumbled upon their Mental Health guides and found a wealth of information regarding the growing need to invest in the mental health of employees. They also list a couple of mental health blogs and are the creators of this five minute video on the subject -

For more information go to ACAS and search for Mental Health.