In the UK you can operate as a ltd company all you like, but it won’t make a jot of difference if HMRC decides that IR35 applies to your role.

An “employer” can structure the contract to avoid IR35, but that’s precisely my point - now the “employer” needs local legal knowledge to maintain an arms length contractual relationship. (HMRC has also made the “employer” liable for IR35 problems: you can’t just punt the legal liability onto the “employee” and forget about it anymore.)