The Guardian breathlessly reports: 'Body swap research shows that self is a trick of the mind'. As one would expect given journalistic standards, there's nothing in the substance of the story that supports this headline. The research shows that our sense of self-location is fallible; we can be tricked into feeling like another body is our own. Our mental representations may be redrawn as though from a different perspective, i.e. 'centering' on a dummy rather than our true bodies. But that shouldn't be surprising. (It's in the nature of a representation that it may misrepresent.)
So I'm not sure how or why this is supposed to have any metaphysical implications for the 'self' (whatever they mean by this). How is this any different from noting that a twig in water appears bent, and concluding that "twigs are a trick of the mind"?