Vodafone Group PLC said it restructured its agreement with infrastructure provider CityFibre Infrastructure Holdings Ltd. to facilitate its rollout of full-fiber broadband in the U.K.

Under the new deal, the telecom company will offer its Vodafone Gigafast Broadband on a rolling, 12-month exclusive basis while the service is rolled out in 12 towns and cities covered in the deployment's first phase. Exclusivity had previously been dependent on the time taken to launch the network in each location.

The telecom company will also join British Telecom-owned Openreach Ltd.'s fiber network trial in Salisbury by migrating its local customers to Vodafone Gigafast Broadband without up-front connection fees.

Goldman Sachs-backed CityFibre on Jan. 21 announced its acquisition of TalkTalk's fiber business.