When writing to a prisoner client the letter should be sealed in a plain envelope addressed to the prisoner. That envelope should also bear the name, address and telephone number of the firm and a reference number, the words "legal correspondence" and the signature of the legal adviser or his/her assistant. Alternatively, this information could be contained in a covering letter to the prison authorities. In either case, the correspondence should be addressed to the Governor of the establishment concerned and on receipt at the prison the outer envelope would be opened and the inner envelope passed unopened to the prisoner.

This will ensure that legal correspondence between solicitors and their clients remain confidential.