The beleaguered WPP agency was forced to repitch for the UK portion of the mobile phone account in October. BBH is now responsible for the entire £47m UK spend.
The appointment unpicks Vodafone's allocation of agency duties, put in place in September 2004: JWT handled domestic advertising in all markets, while BBH had responsibility for pan-regional strategy and creative.
The Vodafone global director of brand and customer experience, David Wheldon, said: "BBH has been awarded the UK business to go alongside its role as the global lead creative agency. JWT remains our network partner and we've just given it our business in our fastest-growing market, Turkey."
JWT's London office has suffered a number of losses in the past two years, but has failed to replace them with any significant new business.
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