Luanda, in Angola, is second in annual cost-of-living survey as London slips to 25th and Australian cities move up. Tokyo has regained the dubious honour of being the world's most expensive city, where a cup of coffee will set you back £5.25, a newspaper £4 and a litre of milk £2. The Japanese capital topped the annual cost-of-living survey by the HR consultants Mercer, which ranks cities according to the needs of expatriates. Luanda, in Angola, where more than half the population of 5 million live in poverty and where the Foreign Office advises visitors not to venture out at night, was the second most expensive. ... (full story)