By Ali Lyon Planned changes to the non-dom tax regime could trigger a “mass exodus” of wealthy investors from the UK, costing the taxpayer around £1bn by the end of this parliamentary term, a new report has warned. The study from Oxford Economics, which polled 72 non-doms and over 50 tax advisors, found nearly two thirds of people with the tax status are planning to leave the UK within the next two years. Over eight-in-ten non-dom respondents identified the application of inheritance tax to their worldwide assets – one of the core changes that the Labour government is making to the status – as…