Britain will on Thursday join the US in warning that any action by Iran to close the Strait of Hormuz would be “illegal and unsuccessful,” insisting that western navies in the Gulf must ensure the free flow of oil trade, the FT says. Amid signs that the European Union has now agreed in principle to ban oil imports from Iran this month, Philip Hammond, Britain’s defence secretary, will warn the Iranians that the UK would respond militarily if Tehran tries to close the strait in retaliation over sanctions. Meanwhile in Nigeria, the FT reports, union leaders have called for a nationwide strike from Monday to protest government plans to cut fuel subsidies. “All offices, oil production centres, air and sea ports, fuel stations, markets, banks, among others will be shut down,” the unions said in a joint statement. “We advise Nigerians to stockpile basic needs, especially food and water.” Read more