The Competition and Markets Authority has opened a deep review of a £2bn transaction that would see shareholders of Virgin Media O2 acquire the country’s fourth‑largest broadband operator, Netomnia. Nexfibre, a joint venture of Liberty Global and Telefónica, led the move, fast‑tracking the inquiry to secure quicker approval.

Netomnia’s purchase would expand an 8‑million‑home fibre network, a move that could reshape a sector that has seen more than £31bn raised by “altnet” challengers. Yet the UK’s broadband landscape is highly indebted, with over £9bn of net debt, making consolidation a risky proposition.

The CMA’s fast‑track request bypasses an initial probe, but the regulator will still evaluate overlap between VMO2’s existing network and Netomnia’s. Critics, including City Fibre’s boss, argue the merger could stifle competition. The final decision is set for December, potentially delaying the deal’s completion.

If approved, the acquisition would bring a sizeable fibre footprint under the control of a major operator, tightening supply chains and raising barriers for new entrants. Investors will watch the CMA’s verdict closely, as it could set a precedent for future broadband consolidations in the UK.