The company, which is challenging BT in the race to build fibre, said the funds comprised 825 million pounds of equity and a 300 million increase in its banking facilities.

It said Abu Dhabi sovereign fund Mubadala Investment Company and Interogo Holding, a foundation-owned investment group, would join existing investors Antin Infrastructure Partners and Goldman Sachs, as minority shareholders as a result.

CityFibre Chief Executive Greg Mesch said the funds would not only underpin its rollout to up to 8 million homes across 285 cities, towns and villages, but would also enable it to participate in the government's "Project Gigabit" programme to extend its network to rural areas.

($1 = 0.7239 pounds)

(Reporting by Paul Sandle; Editing by Kate Holton)