Britain's interior minister Theresa May and justice minister Michael Gove are the frontrunners to replace Prime Minister David Cameron, who announced his resignation in the wake of the historic vote to leave the EU.
Based on what May and Gove have said in launching their leadership bids this week, here are the two candidates' stances on some key policy issues:
BREXIT WHEN?
* May, who backed the "Remain" camp in the referendum, has said Article 50 "should not be invoked before the end of the year",
* Gove, a Brexit campaigner, said: "I have no expectation that it will be triggered in this calendar year"
IMMIGRATION
* May said she wanted "action on free movement" and to "regain control of the numbers of people who are coming from Europe"
* Gove said: "I will end free movement, introduce an Australian-style points-based system for immigration
SINGLE MARKET
* May said she would negotiate the "best possible access for trade in goods and services".
* Gove says Britain would leave the single market and negotiate a series of bilateral trade deals with other countries
GENERAL ELECTION
* Britain's new leader does not have to call a general election to be confirmed in office and both Gove and May have ruled one out before the next scheduled poll in 2020
* May has also excluded a second referendum on the terms of Britain's exit from the EU -- a possibility mooted by some "Remain" supporters
