By Ali Lyon A controversial ‘Tiered Tax Regime’ (TTR) charging wealthy foreign nationals a flat rate of tax based on their net wealth would make the UK a more attractive proposition to high net worth individuals and help stem the departure of non-doms, a fresh study has argued. Under the proposal, which the study claims has the overwhelming support of the non-dom community, non-doms would pay an annual charge of between £200,000 and £2m across four bands based on the total value of their assets net their debts. Those with a net wealth under £100m would pay an annual charge of £200,000. Non-dom…