As mobile operators gear up to densify their networks with small cells and even Cloud-RAN, there is a new opportunity for wholesale fiber providers, to enable fronthaul and backhaul. This is propelling fiber providers such as CityFibre in the UK and Zayo in the US to expand their activities in anticipation of new network architectures and eventually 5G. CityFibre plans to raise up to £200m ($258m) through the sale of shares in order to grow its UK footprint, and also to support service providers in the residential space too. CityFibre aims to raise minimum gross proceeds of £185m ($239m) at £0.55 ($0.71) per share in the new sale. It has the backing of new and existing shareholders including Woodford Investment…