British Prime Minister Boris Johnson declared a mission to build an international coalition against Russia and wean off dependence on its oil and gas exports in protest against the conflict with Ukraine, as he embarked on a visit to the Gulf region on Wednesday. Johnson is scheduled to meet with leaders in Abu Dhabi and Riyadh for talks on energy, regional security and humanitarian relief as part of what Downing Street described as the UK's efforts to galvanise global action on the crisis in Ukraine.