UK asset managers face retail cost hit after any messy EU exit

By Simon Jessop and Sinead Cruise LONDON (Reuters) - Some British asset managers face a rise in costs to keep selling one of Europe's most lucrative mutual funds to wealthy investors on the continent and beyond if the country votes to quit the European Union. Uncertainty surrounds Britain's entire relationship with Europe should its citizens opt on June 23 to leave the EU. Matters would be further complicated if Britain decides - or is forced - to stay outside the European Economic Area (EEA), a