The ICC says its investigation into alleged crimes against humanity will continue despite the withdrawal.
Sebastia, a 3,000-year-old site, faces threats as Israel intensifies plans for land seizures and settlement expansions.
Burnham is the fifth British prime minister to deal with President Zelenskyy since the war on Ukraine started in 2022.
Andy Burnham, Britain’s new prime minister, welcomed Ukrainian President Volodymyr Zelenskyy to the United Kingdom.