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A typical business trip in London costs 32% more than in Brussels and 18% less than in Geneva.
Hong Kong falls from regional top spot last year to second place.
Average cost of a business trip to Singapore is eight per cent cheaper than in Hong Kong.
New York is the most expensive location in the Americas and the world for high-end rental accommodation.
London is the fourth most expensive in the world despite Brexit.
Rents fall in Singapore - now seventh most expensive in Asia.
Hong Kong remains the most expensive location in Asia for high-end rental accommodation.
UK cities fall dramatically in global rankings - Central London drops 57 places and out of top 100.
Manhattan drops nine places to fall out of global top 20 most expensive locations.
Tokyo retakes the global top spot for first time since 2012 - Japanese locations move back into global top 10 most expensive.