Research inputs
A constrained-zone envelope vs the DC's load; flexibility (shiftable compute, BESS/UPS, backup gen) tucks the load under the cap. Firm vs flexible reinforcement & lead time.
INDICATIVE PROTOTYPE · figures pending NUMBERS v2.2 sign-off · internal — not for external release
Marketing beat · the connection unlock
Britain's data-centre queue hit 125 GW — nearly 3× the size of the entire grid's peak demand. Most are stuck behind years of reinforcement.
The wait is 7 years.
Or the flex you switch on today.
Or the flex you switch on today.
Firm connection
2033
full reinforcement · build the wires first
Reinforcement on the system[NEEDS-KEY] · indicative · £126m
Shiftable computedefer non-urgent AI / batch workloads
−21 MW
On-site storage (BESS / UPS)discharge through the system peak
−15 MW
Backup generationlast resort · the dirtier lever
−8 MW
A 60 MW data centre in a constrained zone. Firm connection: seven years of waiting, £126m of reinforcement.
Plane A + BData-centre
connection
connection
Scoping question
Can a data centre's flexibility avoid grid reinforcement, connect sooner — and is that fair to everyone else on the network?
Method
Size the DC, set its flex levers, watch a day run against the zone envelope — connection date, reinforcement deferred, clean-flex & fairness.
Plane A + B · flexible-connection sandbox
Test the connection before you build the wires.
Ofgem is weighing whether flexibility should be a condition of connection. This sandbox tests it in shadow mode: configure a data centre and its flexibility, run it against a constrained-zone envelope, and see whether it can connect without reinforcement — how many years sooner, how much cost deferred, and whether the deal is clean and fair.
Size the data centre
Data-centre size 60 MW
Zone headroom (no reinforcement) 18 MW
Flexibility levers
Shiftable compute 35%
On-site BESS / UPS 15 MW
Backup generation 8 MW
Flexibility as condition of connection
Ofgem is exploring this (CFI 2026). With it off, the DC may still seek a firm connection.
Connect by synthetic
2026
firm: 2033 · 6 yrs sooner
Reinforcement deferred indicative
£126m
vs a firm connection · per-site only · [NEEDS-KEY] system-wide
Firm capacity needed
16
of 60 MW · rest met by flex
Clean-flex share
82%
Fair · clean flex
A day in the constrained zone · 00:00
zone envelope firm load flexed load breach → reinforcement
Clean flexible connection. The DC tucks under the zone envelope using compute-shifting & storage — connecting ~2026, roughly 6 years sooner, deferring £126m of reinforcement that would otherwise hit everyone's bills.
Value created · a win for all three sides
Data-centre developer
6 yrs sooner
synthetic · sandbox
Connects sooner and cheaper. Proven flexibility turns a multi-year reinforcement wait into a flexible-connection offer — de-risked before capital is committed.
Government / regulator
+44 MW
synthetic · per-site
Per-site flex unlocked. Tests whether flexible-connection policy and who-pays could unlock AI growth at network scale — distributional effect evidenced before mandate. [NEEDS-KEY] system-wide.
Consumer
£126m
indicative · per-site
Per-site reinforcement deferred. Fairly-allocated costs keep network charges down for THIS connection — system-wide consumer benefit [NEEDS-KEY].
Context & sources
What this is & isn't: a shadow-mode model on an illustrative constrained zone — not a connection offer or a forecast for any specific site. Reinforcement £/MW, lead times and zone headroom are indicative, pending NUMBERS v2.2 sign-off. System-wide GB curtailment magnitudes are explicitly out of scope: rendered as [NEEDS-KEY] prose where they would otherwise appear (F1 honesty). Enleashed tests the connection; it does not grant connections, set charges or operate the grid. Grounded in live GB reform (Ofgem CFI 2026, NESO connections reform).
- GB demand connections queue rose from 41 GW (Nov 2024) to 125 GW (Jun 2025) — ~3× GB peak demand of 45 GW; ~140 data centres (50 GW) the single largest driver.publishedOfgem CFI 2026 · Green Software Foundation analysis
- Ofgem exploring whether flexible / non-firm / ramped connections — and a minimum demand-flexibility condition — should be conditions of connection for very large users.publishedOfgem Call for Input · DESNZ consultation 2026
- If data centres commit to flexibility at scale, NESO's reinforcement requirements could be materially lower — a public benefit reducing costs for all consumers.publishedGreen Software Foundation · Ofgem response 2026
- DC flexibility = shiftable IT workloads, UPS / BESS storage, thermal inertia & cold storage; new technical spec for flexible connections already available.publishedClean Flexibility Roadmap · Data Centre Review 2026
© 2026 Enleashed Ltd · Confidential — raise materials · data-centre connection sandbox · figures pending NUMBERS v2.2 sign-off, not for external release