Thanks for the reply, although some things aren't completely clear still. I'm more referring to employers NIC. I do a self assessment every year and pay my income tax and class 4 national insurance via that for this work. But in relation to class 1 NIC, what do I need to do if this changes to employment, or is classed as employment for tax purposes? Your CEST tool technically deems this as employment for tax purposes (even though it's freelance work). Do I have any liability for class 1/employers NIC in this case? There's no way to pay such an insurance via self assessment, hence I was referring to the
DPNI scheme