I hate IR35 with passion. I have a boutique consultancy with a varied client list but still, if I do even a few hours work as a sub-contractor for a bigger consultancy, I end up going through an umbrella.
I’ve had to fill in huge numbers of forms, show that I’m a genuine company with PL, EL insurance, environmental, health and safety and modern slavery policies etc and even after all that then log in to some convoluted system to log a few hours of advice. Arrrgh.
I get that there have been some people working as contractors that should really be employees but the whole system seems to be undiscerning and the contracting out of decision making tends to funnel even the bona fide small businesses through umbrella agencies.