Pure Data Centres is putting £24 million into Royal Wootton Bassett, Wiltshire to build what the company says will be the UK’s largest biochar carbon-removal plant. The site has now hosted a visit from a local MP, signaling that biochar, often the quiet cousin in the CDR family, is starting to attract serious capital and political attention in Britain.

Why this matters

The UK has plenty of headlines about direct air capture and engineered removals, but very few operating CDR facilities of any kind on British soil. A £24 million biochar plant is not a megaproject by industrial standards, but for UK carbon removal it is a meaningful step. It also pairs a data centre operator with a durable carbon removal pathway, which is the kind of corporate-buyer-meets-supplier setup the voluntary carbon market has been trying to manufacture for years. Biochar matters because it is one of the few removal methods available today at commercial scale, with a permanence window typically measured in centuries when the material is produced and handled correctly. It sits in a useful middle ground: more durable than most nature-based credits, cheaper than DAC, and powered by a feedstock (waste biomass) that already exists in agricultural and forestry supply chains.

What we know about the project

The basics, drawn from the Business Biscuit report:

  • Developer: Pure Data Centres, a UK data centre operator branching into carbon removal.
  • Location: Royal Wootton Bassett, Wiltshire.
  • Investment: £24 million.
  • Claim: Set to become the UK’s largest biochar carbon-removal facility.
  • Political profile: A Wiltshire MP has visited the site following the investment announcement. The source material does not give us throughput figures, feedstock sourcing details, expected tonnes of CO2 removed per year, the offtake structure, or which registry will issue credits. Those are the numbers that determine whether this is a serious climate asset or a marketing exercise, and we will be watching for them.

How biochar removal actually works

Biochar is made by heating biomass (wood chips, agricultural residues, sometimes sewage sludge) in a low-oxygen environment, a process called pyrolysis. The carbon in the plant material, which would otherwise return to the atmosphere as the biomass decomposed or was burned, gets locked into a stable charcoal-like solid. That solid can then be applied to soils, used in concrete, or stored. The carbon removal claim depends on three things being true at once:

  1. The feedstock is genuinely waste or sustainably sourced (not trees cut specifically for the plant).
  2. The pyrolysis process does not leak more emissions than it sequesters.
  3. The biochar ends up somewhere it will not re-oxidise for a long time. Credible biochar projects can hit durability of 100 to 1,000+ years depending on conditions. Sloppy ones get marked down hard by registries like Puro.earth and Isometric, or rejected outright.

The data centre angle

The fact that a data centre operator is funding this is worth pausing on. Data centres are among the fastest-growing sources of electricity demand globally, driven by AI training and inference workloads. Operators face mounting pressure from corporate customers (and their own net-zero commitments) to address operational emissions they cannot fully eliminate today. Buying credits is one route. Building your own removal capacity is another, and it gives the operator more control over price, quality, and supply. If Pure Data Centres is using this facility partly to supply removals against its own residual emissions, that is a vertical integration play we are likely to see more of from hyperscalers and colocation providers. The important caveat: removals only count as climate progress when they sit on top of aggressive emissions cuts, not as a substitute for them. Data centre operators should be racing to clean grids, more efficient cooling, and load shifting first. CDR is for what is left over.

What we do not know yet

The Business Biscuit piece is essentially an announcement of an MP visit, not a technical deep-dive. Several things remain unclear:

  • Tonnes per year: No published figure for annual removal capacity.
  • Feedstock: Where the biomass comes from and whether it is genuinely waste-stream.
  • Verification: Which carbon standard, if any, will certify the credits.
  • End use of biochar: Soil amendment, construction additive, or dedicated storage.
  • Timeline: When the plant comes online and reaches full output.
  • Price per tonne: Will credits be sold on the voluntary market, retired internally, or both. Until those details land, calling this the UK’s largest biochar facility is a claim worth tracking but not yet a benchmark anyone can audit.

What to watch

If Pure Data Centres publishes a methodology, signs an offtake with a registry, and starts disclosing tonnes delivered, this becomes one of the more interesting UK CDR projects to follow. £24 million is a real commitment, and Wiltshire becoming a node for biochar production would help diversify a UK removals pipeline that is currently very thin. If the project goes quiet after the ribbon-cutting photos, that tells its own story. Either way, biochar is creeping into the British CDR conversation, and that is a development worth noting.

Source: businessbiscuit.com