A third of all U.K. travel agencies will close in the next 10 years unless agents embrace the internet, a travel chief has warned.

Numbers could fall from just over 6,000 now to around 4,200 in a decade's time, said Chris Mottershead, the former boss of travel agency Lunn Poly.

"If you're not on the internet now you really have to ask yourself what century you are in," he told delegates at the Association of British Travel Agents' convention in Marrakech, Morocco.

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