Singapore is the world’s most expensive city for expatriates and travellers for the third year running. The Asian city island state tops Zurich and Hong Kong in the latest rankings by the Economist Intelligence Unit (EIU), which surveys 400 individual prices across 160 products and services, and then compares all places with New York — the base city. London is the 6th most expensive city, Dublin is at 24 and Brussels, the capital of the European Union is at 38.