It should come as no surprise that measures contained in the Budget replace the UK's current tax regime for non-UK domiciled individuals ("non-doms") with a new regime. Before the general election, the previous Conservative government and the Labour party in opposition both committed to introducing this change.
The previous Conservative government released their plans to change the tax regime for non-doms, but these proposals never reached the legislative stage before the general election.
Since winning the election, the new Labour government has published a policy paper outlining proposed measures to change the tax regime for non-doms, and, as promised in that paper, further detail (including 100 pages of draft legislation) has now been released following the Budget.
As with all new tax regimes, the devil will no doubt be in the detail of the legislation in terms of how these rules will work in practice.