The Bar Council explanation of what barristers do:

http://www.barcouncil.org.uk/about-the-bar/about-barristers/

The Bar Council’s Public Access website

http://www.barcouncil.org.uk/using-a-barrister/public-access/

The Bar Council’s Public Access Directory:

http://www.directaccessportal.co.uk/

The Bar Standards Board’s Public Access Guidance:

https://www.barstandardsboard.org.uk/for-the-public/finding-and-using-a-barrister/how-to-instruct-a-barrister/public-access-guidance-for-lay-clients.html

The Bar Standards Board’s Rules relating to public access:

https://www.barstandardsboard.org.uk/regulatory-requirements/for-barristers/public-access/