This Practice Note considers the general principles, meaning and rationale behind privilege. It identifies the different types, including legal advice privilege and litigation privilege (known collectively as ‘legal professional privilege’ (LPP)), common interest privilege, joint privilege, public interest immunity (PII) and closed material procedures (CMP). It looks at the effect of privilege on disclosure and inspection and the difference between confidential documents and privileged material. It also considers to whom the privilege belongs, for how long it lasts and the effect of privilege on case management. Practical tips on privilege are also offered. What is privilege? In English law, privilege is a fundamental right allowing a party, or its successors in title, to withhold from production certain documents (see Court of Appeal decision in Addlesee v Dentons Europe). Where privilege exists, it does not generally displace the obligation to disclose the document's existence, but means that the relevant document will not have to be produced to other parties or the court. For further guidance, see Do you need to disclose privileged documents? below. Special protection