I'll refer you to this article: https://www.theregister.co.uk/2019/11/28/political_parties_fall_over_themselves_to_win_tech_contractors_vote_by_pledging_to_review_ir35/
I'll refer you to this article: https://www.theregister.co.uk/2019/11/28/political_parties_fall_over_themselves_to_win_tech_contractors_vote_by_pledging_to_review_ir35/