Telefónica and Liberty Global, who oversaw the merger of Virgin Media and O2 to create the enlarged group last year, will begin contacting potential investors this week but some informal discussions have already begun, the report said, citing a person familiar with the matter.

The new company is seeking a substantial sum from third-party investors and the external capital injection could eventually total as much as 1 billion pounds ($1.34 billion), another report from Sky news said.

Last year, the British cable and mobile provider said it would upgrade its entire network serving 15.5 million premises to full fibre by 2028.

Virgin Media's immediate rival BT has also set out a target of providing fibre-broadband to 25 million premises, by the end-2026.

Last year, Virgin owner Liberty Global and Spain's Telefonica agreed on a $44 billion merger. The 50:50 joint venture is being led by Virgin Media boss Lutz Schüler.

Virgin Media, Telefonica and Liberty Global didn't immediately respond to Reuters' requests for comment.

(Reporting by Jaiveer Singh Shekhawat in Bengaluru; Editing by Toby Chopra)