Brexit referendum

FILE - In this Thursday, Nov. 22, 1990, file photo, Britain's then Treasury chief John Major outside Parliament after he announced he would stand to replace Margaret Thatcher as prime minister. He won and sought to mend fences with the then European Community while still negotiating an opt-out to keep Britain out of the euro single currency. On Jan. 31, 2020, Britain is scheduled to leave what became known as the European Union after 47 years of membership. (AP Photo/Robin Nowacki, File)

Britain's Prime Minister Boris Johnson leaves 10 Downing Street to attend the weekley session of Prime Ministers Questions in Parliament in London, Wednesday, Jan. 22, 2020. (AP Photo/Kirsty Wigglesworth)

Sajid Javid, Britain's Chancellor of the Exchequer, pictured during the 50th annual meeting of the World Economic Forum, WEF, in Davos, Switzerland, Wednesday, Jan. 22, 2020. (Gian Ehrenzeller/Keystone via AP)

A member holds a document inside the House of Lords as the European Withdrawal Agreement Bill is debated in London, Tuesday, Jan. 21, 2020. Britain's House of Lords is considering the European Withdrawal Agreement Bill, which is due to pass through its final stages before returning to the House of Commons. (AP Photo/Kirsty Wigglesworth, pool)

British Chancellor of the Exchequer Sajid Javid talks to German Finance Minister Olaf Scholz during an European Finance Ministers meeting at the Europa building in Brussels, Tuesday, Jan. 21, 2020. (AP Photo/Francisco Seco)

FILE - In this Nov. 12, 1944 file photo, Britain's Prime Minister Winston Churchill, left, and General Charles De Gaulle, centre, salute at France's Unknown Warrior at the Arc De Triomphe in Paris. Though allies in World War II, De Gaulle twice vetoed Britain's application in the 1960s to join what was then known as the European Economic Community. Britain eventually joined in 1973 after De Gaulle's successor, Georges Pompidou, lifted France's veto. On Jan. 31, 2020, Britain is scheduled to leave what became known as the European Union. (AP Photo, File)

In this handout photo provided by the House of Commons, Britain's Prime Minister Boris Johnson gestures during the first Prime Minister's Questions of the year, in the House of Commons in London, Wednesday, Jan. 8, 2020. The president of the European Commission warned Britain on Wednesday that it won’t get the “highest quality access” to the European Union's market after Brexit unless it makes major concessions. (Jessica Taylor/House of Commons via AP)

FILE - In this Friday, June 24, 2016 file photo a statue of Winston Churchill is silhouetted against the Houses of Parliament and the early morning sky in London, Friday, June 24, 2016. A day earlier, Britain had voted to leave the European Union in a referendum. On Jan. 31, 2020, Britain is scheduled to leave the EU after 47 years of membership. (AP Photo/Matt Dunham, File)

Britain's Prime Minister Boris Johnson, right, shakes hands with President of Rwanda Paul Kagame at the UK Africa Investment Summit in London, Monday Jan. 20, 2020. Boris Johnson is hosting 54 African heads of state or government in London. The move comes as the U.K. prepares for post-Brexit dealings with the world. (Eddie Mulholland/Pool via AP)

Anti Brexit campaigner Steve Bray demonstrates outside Parliament in London, Wednesday, Jan. 15, 2020. Britain is due to leave the European Union on Jan. 31. (AP Photo/Kirsty Wigglesworth)