John Campbell practises at the Bar from 4–5 Gray’s Inn Square in London and Duma Nokwe Chambers in Johannesburg (where he is Senior Counsel). He regularly appears in media litigation, and has been instructed as counsel in some of the biggest and most high profile cases involving defamation and privacy in South Africa. He regularly appears in trial and appellate courts in both the United Kingdom and South Africa, in cases involving media law, constitutional law, competition law, administrative law, tort / delict, tax and regulatory law. He has published in the fields of public law and defamation, and has acted as a judge in South Africa from time to time, starting in 2008.