Accountants have ‘responsibility’ to challenge IR35, opposition group says Accountants have ‘responsibility’ to challenge IR35, opposition group says Parliamentary group suggests industry must push for change Author Categories A parliamentary group formed of MPs and peers has said that accountancy firms must challenge the new and “deeply flawed” IR35 rules. “The accountancy profession needs to be challenging HMRC on the mess that has been created,” says Ruth Cadbury, MP for Brentford and Isleworth, and co-chair of the Loan Charge All-Party Parliamentary Group (APPG). “I think accountancy firms have a responsibility to be completely transparent with people.” The APPG published a paper in response to the new ‘off-payroll’ rules being brought into effect in the private sector earlier this month.