Investment banks across the US and Europe are telling any staff who have recently arrived back from Mexico to stay at home in a bid to avoid spreading swine flu. It comes as the World Bank revealed that one of its employees just returned from the country has been diagnosed with the virus.

Royal Bank of Scotland has said that that all travel to Mexico has been halted, and employees have been told not to return to work for 72 hours after arriving in the UK from the country. At present, no staff have been sent home.