A recent ruling, Manchester Building Society (Appellant) v Grant Thornton UK LLP (Respondent) [2021] UKSC 20, saw Manchester Building Society succeed in a £32m negligence claim against its former auditor, Grant Thornton in the Supreme Court.

In 2006, Grant Thornton incorrectly advised the society that their accounts should be prepared in accordance with a method called hedge accounting, which could be used to smooth the books and would give a true and fair view of their financial position.