Not shure single digit effective is possible nowadays even outside IR35 - and HMRC has unliterally ruled that some professions are in side IR35 eg all it/develo

Not shure single digit effective is possible nowadays even outside IR35 - and HMRC has unliterally ruled that some professions are in side IR35 eg all it/developer contractors. Actors, film / tv professionals and lawyers etc are for the large part still treated as "self employed"