The great UK altnet consolidation has begun

For half a decade, the story of UK fibre was expansion. Backed by patient infrastructure capital, dozens of “altnets” raced to pass premises before their rivals, often overbuilding the same streets two or three times over.

From land-grab to economics

That phase is ending. With interest rates higher and capital more disciplined, attention has shifted from homes passed to homes connected — and to the unit economics of running a network. Sub-scale builders face a stark choice: merge, sell, or wholesale their footprint to a larger platform.

What it means

Expect a smaller number of larger wholesale platforms, more inter-operator wholesale deals, and a continued shift of subscribers from copper to fibre as the PSTN switch-off accelerates. Consolidation is not a failure of the altnet model — it is its maturation.