IR35 - Is it worth getting an in-place contract amended?

[jamesbrown]

If you are confident of the working practices, then there's no way I would declare myself inside IR35, but I would make sure that I have someone good in my corner if the call ever came.

Agreed, but only if you're confident that everyone in the chain will back you up several years from now and that you can (and do) collect evidence to demonstrate the outside position throughout the contract. Having a poorly worded contract is one thing. Having no evidence base is entirely another. Either way, it would be a fight.