What's that smell?
From the article...
"We have also committed that we will not use information acquired as a result of the changes to the off-payroll working rules to open a new compliance enquiry into returns for tax years before 2021 to 2022, unless there is reason to suspect fraud or criminal behaviour."
So give it about three months before the following letters start getting sent out...
"After ten years of working at Bob's Bolts Ltd where you have self-certified as outside IR35, Bob now want's to retain your specialist skills but inside IR35. Therefore we think you fraudulently self-certified as outside IR35 for the previous ten years and we are going to open an investigation into this fraud!"