The FTSE 100 rebounded on the back of a falling pound, after it was weakened by intense pressure on Theresa May’s leadership.
The pound got a boost on Wednesday as hopes were raised for a resolution to Brexit.
DUP MP Sammy Wilson has accused Northern Ireland’s top civil servant of having a political motive for warning against a no-deal Brexit.
The pound rallied to a four-week high on Tuesday following reports that Britain’s impending departure from the European Union could be delayed.
The FTSE 100 was lifted on Tuesday thanks to planned shareholder payouts by Standard Life Aberdeen and a lack of bad news on the political stage which increased appetite for stocks.
London’s blue chip index edged out of the red on Thursday as US president Donald Trump played down the prospect of an attack in Syria.