VodafoneThree Is Consolidating Mast Sites: What It Means for the Sites Left Behind

In short: VodafoneThree completed its merger on 31 May 2025. In November 2025 Cellnex switched on the first consolidated 4G and 5G site for the combined network, in Burnley, five months ahead of schedule. By May 2026 the two former networks had been integrated across more than 10,000 shared sites, and in June 2026 the first progress report to the Competition and Markets Authority said VodafoneThree was ahead of its first-year target. None of this means every Vodafone or Three mast will go. It does mean that where two sites sit close together, one of them is now doing a job the network no longer needs two sites for. This article explains how far the programme has got, where the risk sits for landlords, and what to check in your agreement.

From one site in Burnley to a national programme

When Vodafone and Three merged, each brought its own grid of masts, and many of those sites overlap. Consolidation means combining both operators' equipment onto one site that serves customers of both networks, and then deciding what happens to the other.

The first public example came on 12 November 2025, when Cellnex announced it had delivered its first consolidated VodafoneThree site, in Burnley, Lancashire, five months early. The work involved a baseband upgrade and new antennas and radio units so that one mast could carry both networks.

A year on, the programme is well past the pilot stage:

• By the end of May 2026, VodafoneThree said the former Vodafone and Three core and radio networks had been integrated, with the shared network spanning more than 10,000 sites.
• The first annual report on the network commitment, published on 26 June 2026, states that VodafoneThree "is on course to meet the Year 3 Network Commitment target, having exceeded its informal Year 1 target". It also records that 2x20 MHz of 1800 MHz spectrum had been activated at almost 15,000 sites across the former Three grid.
• On 5 May 2026 Vodafone agreed to buy CK Hutchison's 49% stake in VodafoneThree for £4.3 billion, with completion expected in the second half of 2026. Decisions about which sites stay and which go will soon rest with a single owner.

Why duplication was always part of the plan

This is the logic of the deal, not scaremongering. The CMA cleared the merger in December 2024 on the strength of legally binding commitments to invest in, and integrate, a combined network over eight years, with the CMA and Ofcom overseeing progress. Vodafone has said it expects more than £700 million a year in cost and capital expenditure savings by the fifth year after completion, alongside an £11 billion investment over ten years. Rationalising the site portfolio, keeping what earns its place and closing what is duplicated, is one of the clearest routes to that saving.

The Electronic Communications Code anticipates this too. Part 6 of the Code sets out how apparatus is removed from land once an operator no longer needs it. Burnley was the first public confirmation that the process had started. The 2026 figures show it is now running at scale.

Where the risk actually sits

For a landlord the question is not whether VodafoneThree will close sites. It will. The question is whether yours is the site the network consolidates onto, or the one that becomes surplus once a neighbouring mast is upgraded. That depends on:

• whether another Vodafone or Three site sits within range, and which of the two better suits the combined network's plan;
• the equipment on your site and how easily it can be upgraded;
• how important your location is for coverage or capacity, particularly in rural areas where the network commitment requires improvement;
• what your agreement says about operator break rights and notice periods.

That last point is where the exposure usually sits. Many telecoms agreements give the operator a break right on as little as six months' notice. Ofcom's standard terms do not fix that figure; it is left to be agreed between landlord and operator, so your own notice period could be shorter, or longer, than you assume. If your site does become surplus, that clause, not a press release, determines how much warning you get and how exposed your rental income is.

There is no official percentage

Neither VodafoneThree nor the CMA has published a figure for the proportion of sites that will be decommissioned. The CMA report counts sites built and upgraded against targets; it does not count closures. Any adviser quoting a flat probability for your mast is presenting a guess as a fact. What can be said with confidence is that the risk varies enormously from one site to the next, and that two masts a short distance apart can sit at opposite ends of the scale.

What to do now

1. Find your agreement and read the break clause and the notice period. If you cannot find it, we can retrieve the lease for you.
2. Check which operator's equipment is on site today and whether anything has been added or removed in the last year. Shared equipment appearing on your mast suggests it is being consolidated onto. Equipment leaving suggests the opposite.
3. Keep any letter from VodafoneThree, Cornerstone or Cellnex that mentions upgrades, consolidation or rationalisation, and send it to a specialist before you reply.
4. Decide what the site is worth to you with and without the income. For some landlords the right move is to renegotiate from a position of knowledge. For others, selling the lease while the income still has clear value to a buyer makes more sense.

We assess individual sites against the factors above and give landlords an initial consolidation risk score out of 100, together with a plain reading of what the break and termination clauses in their agreement actually mean. If you have Vodafone or Three equipment on your land or building, get in touch and we will tell you where your site stands.

This article is general guidance for landowners in England and Wales and does not constitute legal advice. Whether a particular site is at risk depends on its location, its equipment and the wording of its agreement.

Related guides

• Vodafone phone mast lease: what landlords need to know
• Three phone mast lease: what landlords need to know
• Our December 2024 article on the Vodafone–Three merger
• Free lease check

Call us on 01691 791543 or contact us online for a free initial review.

Sources

• Cellnex, 12 November 2025: Cellnex delivers its first consolidated site for VodafoneThree five months ahead of schedule
• VodafoneThree Network Commitment, Annual Progress Report Year 1, 26 June 2026 (GOV.UK)
• CMA, Vodafone / CK Hutchison JV merger inquiry (GOV.UK)
• Vodafone, 31 May 2025: Completion of Vodafone and Three merger in the UK
• Telecoms.com, May 2026: VodafoneThree cheers completion of its network integration
• Light Reading, May 2026: After less than a year, Vodafone takes back control in UK
• Communications Act 2003, Schedule 3A (Electronic Communications Code), Part 6
• Ofcom, Electronic Communications Code standard terms