Russia carried out its largest air strike on Ukraine's energy system since its invasion in February 2022, damaging power units at a dam and causing blackouts for more than a million people
Earlier the French and Dutch finance ministers said they too had pulled out of the summit as international pressure on Saudi Arabia over the disappearance of Saudi journalist Jamal Khashoggi grows.
"The Secretary of State for International Trade has decided the time is not right for him to attend the Future Investment Initiative in Riyadh on 23 October," the spokesman said. "The UK remains very concerned about Jamal Khashoggi’s disappearance ... Those bearing responsibility for his disappearance must be held to account."