Uncertainties created by Brexit have increased
Theresa May resigned as British prime minister in June after failing to complete the Brexit process, paving the way for Boris Johnson to be chosen as her successor by the Conservative Party. However, the uncertainties brought about by Brexit have increased since Johnson took office.
Johnson is a hard-line Brexiteer, as even after becoming prime minister, he has emphasized the United Kingdom will leave the European Union on or before Oct 31. He is also prepared to settle for a "no-deal" Brexit unless the EU agrees to renegotiate the Irish "backstop" issue (that the border between the Republic of Ireland and Northern Ireland remains open - as it is today - whatever the outcome of the UK-EU negotiations about their post-Brexit relationship).
But Brussels has rejected the idea of renegotiating the "backstop" issue, asserting that the deal is non-negotiable. Which means Britain is staring at a no-deal Brexit, which could be disastrous for the UK economy.