UK based fiber network specialist, CityFibre, is reportedly interested in acquiring a stake in TalkTalk's newly formed broadband venture, FibreNation. A report by Sky News claims that CityFibre is among a number of bidders interested in taking control of FibreNation &ndash UK based fiber network specialist, CityFibre, is reportedly interested in acquiring a stake in TalkTalk's newly formed broadband venture, FibreNation.