7 However, legal professional privilege may impliedly be waived where the matters protected by the privilege are relevant to the suit and where the disclosure of those matters is required to enable justice to be done: Telstra Corp v B T Australasia Pty Ltd (1998) 156 ALR 634 at 647 and Lillicrap v Nalder & Son (A firm) [1993] 1 All ER 724 at 731. Unsound mind and undue influence are examples. That is, I consider, the position here. The defendant in her defence and counterclaim has alleged, inter alia, that the deceased was not of sound mind, memory and understanding and has given detailed particulars of that. She was 90 years of age, she was deficient in her cognitive functioning. She suffered disorientation in time and place and her memory was so defective and untrustworthy that she had difficulty in remembering her age, the period of time that she had spent in the nursing home where she was living, and on 5 January 1995, was not able to recall her first name. The defendant has also pleaded that the will was obtained by the undue influence of the plaintiff and has given particulars of that. The plaintiff, in propounding the will as the valid will of the deceased, is thus contesting those allegations. Those allegations are therefore squarely in issue in this case and I consider the public interest in getting to the truth of those allegations outweighs the executor's normal right to legal professional privilege. It is a balancing act between those two competing interests and I consider the balance in this case comes down firmly on the side of rejecting the claim for privilege.