Professional supervision is a requirement for practicing counsellors within the UK and this topic is covered within the BACP (British Association for Counselling an dPsychotherapy) Ethical Framework.
Supervision on a 1:1 basis is for a 90 minute session per month. This is open to both trainee and qualified counsellors.
Supervision can also be offered online and via telephone or face to face for groups (no less than 3) if required.
I have a Post Graduate Certificate in Counselling Supervision and have been practicing as a counselling supervisor for 7 years.