According to https://www.bbc.co.uk/news/election-2019-50547793 Labour plan to end bogus self-employment" so maybe that's how they plan to abolish IR35. You will be directly employed irrespective of whether you or your employer want that to be the case.
Not that I believe any of it. This has been the worst election for unfulfillable promises that I can remember - and that includes N Irish elections as well as UK.