The coronavirus pandemic has masked the economic dislocation caused by the referendum verdict, which backed severing five decades of integration with the European mainland.
The G7 chiefs will be joined over the weekend by the leaders of Australia, South Africa, South Korea, the United Nations and European Union, with India joining remotely.
On the eve of the election, the United States, Britain, France, Germany and Italy said the poll was "neither free nor fair", and Syria's fragmented opposition has called it a "farce".
A further 30 people were reported as having died within 28 days of a positive test for COVID-19, meaning there were 211 deaths between April 9 and 15, a fall of 2.3% compared with the previous seven days.
The pound fell 1.2% against the dollar and 1.7% against the euro between Tuesday and Wednesday as investors took cash off the table after a strong first quarter for the British currency.
Sterling's pullback was "exaggerated," ING analysts wrote, adding that they were "constructive" on the pound, citing Britain's relatively fast COVID-19 vaccine programme.
"Our first priority is to protect the British public, and the vaccine rollout is continuing to that end," the spokesman told reporters. "We don't currently have a surplus of vaccines, but we will consider how they are best allocated as they become available."
The daily growth rate of COVID-19 infections was between -5% and -2%, meaning the number of new infections is shrinking by between 2% and 5% each day, compared to -6% and -3% last week.
The move comes on top of the 16 billion pounds in business rates relief already paid to or earmarked for retail, hospitality and leisure businesses.
By providing more targeted support than the business rates appeals system, our approach will help protect and support jobs in businesses across the country.