The Crown Estate Offshore Wind Leasing Round 5 for the Celtic Sea

UK — The Crown Estate Offshore Wind Leasing Round 5: Celtic Sea Floating (2023-2025)

1. At a glance

Sources (4 primary): information-memorandum (69 pages, December 2023); faq (13 pages, February 2024); spring-2025-update (3 pages, ~March 2025); tce-third-site-announcement-nov-2025 (Crown Estate announcement of Ocean Winds award, 19 November 2025).

2. What makes Round 5 structurally different from R4 and from the four earlier pilots

3. The R5 auction mechanism in detail

3.1 Online ascending clock auction with exit bids

Per the R5 Information Memorandum §3.4:

ITT Stage 2 will identify successful Bidders for each PDA via an online ascending clock auction (referred to as the Auction). All three PDAs will be auctioned at the same time during a series of discrete Auction Rounds.

During each Auction Round, Bidders will be able to submit a single Option Fee Bid in respect of any one PDA at the then current Auction Price specified by The Crown Estate for the relevant PDA in that Auction Round.

Any Bidder who chooses not to submit an Option Fee Bid at the then current Auction Price for any of the PDAs in an Auction Round will have to exit the Auction for all of the PDAs. A Bidder exiting the Auction must submit an Exit Bid, representing the maximum Option Fee that the Bidder would be willing to pay in respect of a given PDA.

Subject to the detailed Auction rules which will be issued at ITT Stage 1, the Auction will end when there is no more than one Bidder who is willing to meet the Auction Price for each PDA in any given Auction Round (i.e. a maximum of one Bidder willing to meet the live Auction Price for each individual PDA in an Auction Round). At that point, the Auction will end and Preferred Bidder status will be awarded to those Bidders who submitted Option Fee Bids at the Auction Price or the highest Exit Bid in the final Auction Round for the relevant PDA.

Mechanical interpretation:

• The Crown Estate sets a starting Auction Price for each PDA (apparently £350/MW/year — this is the final clearing price all three winners paid).
• In each round, bidders can bid for at most one PDA at the current Auction Price.
• Between rounds, the Crown Estate informs bidders how much the Auction Price will increase for the next round.
• A bidder who doesn't want to bid at the new price must exit the auction entirely and submit an Exit Bid indicating the maximum option fee they would pay (bounded by the previous round's price as a floor).
• The auction continues until each PDA has at most one bidder willing to meet the current Auction Price. At that point, the auction ends and Preferred Bidders are awarded:
  • If a PDA has exactly one bidder at the current Auction Price → that bidder wins at the Auction Price.
  • If a PDA has zero bidders at the current Auction Price but has an Exit Bid → the highest Exit Bid wins the PDA at the Exit Bid price.
  • If a PDA has zero bidders and no Exit Bid → the PDA is unallocated and the Crown Estate falls back to the direct-award process.

June 2025 outcome: two of three PDAs cleared via the auction (Equinor and Gwynt Glas/EDF-ESB JV at £350/MW/year) and the third PDA was unallocated — meaning either (i) no bidder submitted a bid at the starting Auction Price for that PDA, or (ii) bids were withdrawn during the auction process. The Crown Estate then initiated the direct-award process and selected Ocean Winds in November 2025 at the same £350/MW/year rate.

3.2 The direct-award fallback

The R5 auction is the first pilot in the set to have an explicit non-auction fallback for unallocated sites. Per the Crown Estate's 19 November 2025 announcement:

Following the auction, The Crown Estate stated it would ensure the delivery of the full potential capacity of up to 4.5 GW available through Round 5 through deployment of a third site. Since then, it has been actively engaging the market to secure a developer for the third site, with Ocean Winds successful following a direct award process in accordance with the Procurement Act 2023.

The direct-award process is not part of the auction mechanics — it is a separate procurement procedure the Crown Estate conducts under a different legal basis (Procurement Act 2023 rather than a negotiated procedure). The Ocean Winds award terms match the auction clearing price (£350/MW/year, 1,500 MW, same AfL-to-Lease structure), suggesting the Crown Estate used the auction outcome as a price anchor for the direct-award negotiation. This is effectively a price-setting auction followed by a supply-expansion negotiation — a mechanism that makes the auction robust to bidder shortage without re-running the whole auction.

3.3 The MLOC cap as ITT Stage 2 competitive ceiling

A distinctive R5 feature: the Maximum Level of Cash (MLOC) calculated at ITT Stage 1 based on the Bidder's audited financials serves as a cap on the maximum Option Fee Bid the Bidder can submit during the auction. The formula is:

$$ \text{MLOC} \geq (3 \times \text{Option Fee Bid} \times 1{,}500\text{ MW}) + (1.5 \times £30\text{m annual development costs}) $$

This means a Bidder with an MLOC of £495m (for example) cannot bid more than £100,000/MW/year on any PDA, because (3 × 100,000 × 1,500) + (1.5 × 30m) = £450m + £45m = £495m. The cap is applied per-bidder, per-PDA, during the auction.

This is a financial-capacity-to-price-cap linkage — a mechanism that ensures only bidders with demonstrated financial resources can bid high, preventing unserious high bids from winning. The cap is calculated at ITT Stage 1 based on the Bidder's audited financials and is fixed for the duration of the auction.

3.4 Non-price qualification gates

R5 bidders must commit (at ITT Stage 1, pass/fail) to onshore social and environmental commitments:

• Apprenticeships plan: ≥3.5% of new workers employed as apprentices
• Skills development plan: identify skills gaps + plan to address them
• NEETs plan: ≥10% of all new workers aged 19-24 must be (or have recently been) NEETs — Not in Education, Employment or Training
• Community impact plan: active engagement with potentially affected communities
• Ports plan: identify ports intended for assembly/deployment (Port Talbot and Port of Bristol are identified as likely locations)

These are mandatory qualification gates, not weighted scoring dimensions. All bidders must commit to them to qualify. A bidder who fails to provide credible plans fails ITT Stage 1 and cannot proceed to the auction. The plans become contractual commitments under the Wind Farm AfL / Lease — enforceable by the Crown Estate throughout the development and operating life of the project.

Contrast with Carolina Long Bay bidding credits: R5's non-price commitments are pass/fail gates, not price-discount dimensions. They do NOT affect the competitive bid amount; they are a floor that all bidders must clear. Carolina Long Bay's bidding credits, by contrast, allowed a bidder to claim a discount on their winning bid based on commitments made — the commitments translated directly into price reductions. R5's commitments translate into qualification passes, not price impacts.

4. The three R5 winners

Gwynt Glas and Equinor signed Agreements for Lease in October 2025. Ocean Winds signed its AfL on 3 March 2026.

Why £350/MW/year uniform

All three winners pay the same option fee rate — a striking outcome that contrasts sharply with R4's dramatic price spread (£76,203 – £154,000/MW/year). The uniformity suggests:

1. The auction closed at or very near the starting Auction Price. The Crown Estate set £350/MW/year as the opening Auction Price and the clock did not materially ascend — bidder demand was thin enough that the auction cleared before any price discovery in higher rounds.
2. The direct-award for PDA 3 intentionally matched the auction clearing price — the Crown Estate had an implicit obligation not to give Ocean Winds preferential terms relative to Equinor and Gwynt Glas.
3. R5's option fee is substantially below R4's — even the lowest R4 option fee (RWE at £76,203/MW/year for Dogger Bank) is 218× higher than R5's £350/MW/year. This reflects: (i) floating wind's earlier technology maturity and higher project-level risk; (ii) R5's deeper site waters and less-developed supply chain; (iii) thinner bidder competition in a nascent market; (iv) Crown Estate's deliberate choice of a lower starting Auction Price to encourage participation in a derisking round.

The 50% option fee reduction for consenting delays further reduces the effective option fee, making R5 substantially cheaper than R4 on a £/MW/year basis even before accounting for the technology risk premium.

5. Timeline

7. Schema implications — what R5 adds beyond R4 and the four original pilots

Preliminary observations for the R5 validation summary:

1. Ascending clock auction with Exit Bids — a specific auction mechanic that v0.5's Axis 2 bid_format doesn't yet enumerate. The Exit Bid mechanism is interesting because it creates a deferred-acceptance structure: a bidder who exits can still win at their Exit Bid price if the clock fails to generate a competing live bid. This is not quite the same as US NY Bight's exit bid (which is single-lease and within-round), nor the same as the German dynamic bidding procedure's Zwischenrunden-Gebote (which are intra-round mid-level bids). R5's Exit Bid is an explicit bidder-level mechanism for graceful exit with residual eligibility.

2. Direct-award fallback under Procurement Act 2023 — a non-auction fallback process that runs after the auction concludes. The schema needs to express this as a separate auction record or as a fallback_mechanism sub-structure on Axis 8's process stages. v0.5 does not model non-auction award paths. The direct-award is a distinct auction_type (or perhaps award_type) rather than an auction mechanism per se.

3. Consenting-delay option-fee discount — a mechanism that reduces the winner's prize_consideration obligation by 50% per year of delay. This is not simply a penalty (like Thor's defective-performance penalty) — it's a developer-friendly discount that kicks in when project risks materialise beyond the developer's control. v0.5's prize_consideration structure does not have a delay_discount_schedule field; this is a candidate addition for v0.6.

4. Non-price qualification commitments with quantitative thresholds — apprenticeships ≥3.5%, NEETs ≥10%. These are quantitative qualification gates, not binary pass/fail gates. v0.5's Axis 3 supports binary gates cleanly but the quantitative threshold structure (e.g. "≥3.5%") may need a qualification_gate.threshold_structure sub-field that distinguishes binary | quantitative_minimum | quantitative_maximum | range.

5. MLOC-as-price-cap — R5's MLOC is both a qualification threshold (at ITT Stage 1) AND a cap on maximum bid (during ITT Stage 2 auction). This is a dual-use financial constraint that v0.5 doesn't explicitly model. The qualification-gate aspect fits Axis 3 cleanly, but the bid-cap aspect fits Axis 2's bid_format — the same financial parameter gates entry AND constrains bid behaviour. Schema: a financial_parameter_links structure showing that Axis 3 gate N is linked to Axis 2 bid-cap M.

6. Uniform clearing price outcome — all three R5 winners paid the same option fee (£350/MW/year). This is unusual enough to be worth capturing in the validation summary, but it's not a schema addition — it's an observation about the competitive outcome. The schema already supports this via Axis 2's clearing-price data.