2. The second thing you do here is you get the second firm of solicitors to sue the first firm of solicitors for breach of fiduciary duty. A firm of solicitors owes a fiduciary duty to their client (your uncles's estate) not to act in circumstances where their duty to the estate conflicts with a duty owed to another client, such as the friend of your uncles. Accordingly, the first firm can be sued for breaching this fiduciary duty they owed to your father's estate. They took on the job of representing the estate whilst also helping the friend make a claim on the estate. For this, they are liable to the estate in damages. The minimum that can happen here is it will reduce the solicitor's bill. Additionally, you may find that the "friend's" claim might diminish in extent or never happen. However, the solicitors here, rode two horses at the same time. So you should make them pay for them. Ensure the new solicitor is happy to sue the old firm before you give them the work to administer the estate.