At the start of the year RSM, ranked seventh in the Accountancy league table of top 75 firms, admitted in a footnote to its accounts for the year ended 31 March 2019 that a review of the accounting for professional liability claims provisions had identified an error in the application of group’s accounting policy affecting the 2018 and earlier year ends. This amounted to almost £10m over two years with a net £2.2m impact on profits.