As it was a post balance date event, then it would not matter if...

As it was a post balance date event, then it would not matter if the auditor was new.

IMO related party transactions should be disclosed and IF the investment was in a company which had common directors then the post balance date event note should disclose that it was a related party transaction. I don't have all the facts though but one would think the auditor would be very diligent in investigating every transaction this lot do.