Should I put my masters degree in Music on my CV?

[Cowboy Bob]

I always thought the substitution clause was basically an IR35 dodging gimmick - and that is most definitely not how I have experienced job interviews etc.

I don't rock the boat during the interview. I make my position clear during the contract negotiation phase either direct to the client, or via the agency if there is one.

And yes, it might be a gimmick in reality, but you've got to make sure that the HR department are on your wavelength, or when Hector asks to speak to them you'll get a shock. Much like that guy up in Scotland (something to do with the oil industry I think) can attest to since that was one of the main reasons he lost his IR35 case if I recall correctly.