The favourite to become Britain's next prime minister on Sunday vowed to push for an EU trade deal that limits immigration, as a law firm warned Brexit needed parliament's backing to begin.
Though she campaigned for the "Remain" side, interior minister and Conservative leadership frontrunner Theresa May has said she will honour the result of the referendum and has ruled out holding a general election before 2020.
Finance minister George Osborne plans to slash corporation tax to under 15 percent -- the lowest for any major economy -- in a bid to keep businesses in Britain, the Financial Times reported Sunday.
May, who polls indicate is the most popular candidate, has insisted there should be "no timescale" for the exit, though her rival Andrea Leadsom has pushed for the process to begin quickly.
But the process faces a legal challenge from law firm Mishcon de Reya, which on Sunday said it would argue the government needs the backing of parliament to act.