Green and Sustainable Finance Lawyers in London

What green finance lawyers in London advise on

Green finance lawyers in London advise on loans, bonds and investment products whose terms are tied to environmental or social outcomes. That includes green and social loans and bonds, where the money must be spent on eligible projects, and sustainability-linked instruments, where pricing moves with the borrower's performance against agreed targets. Increasingly it also covers transition finance for high-emitting businesses that are credibly decarbonising.

The legal work is not only about documentation. A sustainable finance label is a public claim. If the proceeds are misused, the targets are soft or the reporting is wrong, the borrower, issuer, arranger and fund manager can face greenwashing allegations from regulators, investors and campaigners. The commercial value of the label depends on its credibility.

TRW & Co advises corporate borrowers and issuers, lenders and arrangers, fund managers and developers on sustainable and transition finance. We work alongside our ESG and sustainability, banking and finance and debt capital markets teams.

Green, social, sustainability-linked and transition instruments

The market uses two distinct models. Use-of-proceeds instruments ring-fence funds for eligible projects. Sustainability-linked instruments leave the borrower free to use the money for general purposes but link the economics to performance. Choosing between them is the first decision green finance lawyers in London help clients make, because each carries different obligations and different risks.

The principles published by the Loan Market Association with its US and Asia-Pacific counterparts, and by the International Capital Market Association, are voluntary. They are, however, what lenders, investors and second-party opinion providers measure deals against. The LMA's sustainable lending resources and the ICMA Green Bond Principles share four core components: use of proceeds or KPI selection, project evaluation or target calibration, management of proceeds or verification, and reporting.

The UK legal and regulatory framework

There is no single UK statute governing green finance. Instead, the framework is assembled from financial regulation, consumer protection, company reporting and contract law. Green finance lawyers in London need to keep track of each strand because they move at different speeds.

FCA: anti-greenwashing and the Sustainability Disclosure Requirements

The FCA's Sustainability Disclosure Requirements (PS23/16) introduced an anti-greenwashing rule for all authorised firms, which applies to sustainability references in communications with clients and in financial promotions. Since 31 May 2024, those references must be consistent with the sustainability characteristics of the product or service and fair, clear and not misleading. PS23/16 also created investment labels and naming and marketing rules for in-scope investment products.

For lenders and arrangers, the anti-greenwashing rule matters when marketing a sustainable product to clients. For fund managers and wealth managers, the labelling, naming and disclosure rules add product-level obligations. Our financial services regulation team advises on both.

Consumer law and the CMA

Green claims made to consumers fall under the unfair commercial practices rules in the Digital Markets, Competition and Consumers Act 2024. Since April 2025, the Competition and Markets Authority can decide for itself that consumer law has been broken and impose fines, without first going to court. That matters for retail-facing green mortgages, savings products and consumer lending. Our guide to greenwashing and green claims explains the CMA's Green Claims Code.

Corporate and listed company reporting

Large UK companies and LLPs must make climate-related financial disclosures in their strategic reports under the Companies (Strategic Report) (Climate-related Financial Disclosure) Regulations 2022. Listed companies have reported against climate disclosure requirements in the FCA's listing rules on a comply-or-explain basis.

The government published final UK Sustainability Reporting Standards, UK SRS S1 and S2, in early 2026, based on the ISSB's IFRS S1 and S2. They are available for voluntary use, and the government and the FCA are considering whether, and for whom, to make reporting against them mandatory. Borrowers that are not yet required to report should still expect lenders to ask for data on a comparable basis.

Prudential regulation of banks and insurers

The Prudential Regulation Authority expects banks and insurers to manage climate-related financial risks. In December 2025 it published updated expectations in supervisory statement SS5/25, replacing SS3/19. That shapes how lenders assess borrowers' transition risk and why they request transition plans and emissions data in credit processes.

Taxonomy, ratings and transition plans

Unlike the EU, the UK does not currently have a binding green taxonomy in force, so UK deals rely on market principles and, for EU-facing investors, the EU Taxonomy. HM Treasury has confirmed it will bring ESG ratings providers into FCA regulation, which will affect the ratings and second-party opinions that underpin many deals. The government-backed Transition Finance Market Review set out recommendations for building a credible transition finance market in the UK.

Key structuring decisions for borrowers and lenders

Once the instrument type is chosen, several commercial decisions shape the documents. They are worth settling at term sheet stage, because reopening them late in a deal is expensive.

Loan or bond

Bank and private credit loans offer flexibility, confidentiality and easier amendment, which suits sustainability-linked structures that may need recalibration. Bonds reach a wider investor base and can price well where labelled demand is strong, but disclosure is public and changes require bondholder consent. Many groups start with a sustainability-linked revolving facility and later issue labelled bonds once their framework and data have matured.

The size and direction of the pricing adjustment

In sustainability-linked loans, the margin adjustment is usually modest relative to the overall margin, and is often two-way: a discount for meeting targets and a premium for missing them. Some lenders prefer a premium-only structure to avoid any suggestion that they profit from a borrower's failure. Others agree that any premium is paid to a sustainability project or charity instead of being kept. Each approach has accounting and tax consequences that should be checked.

Verification and the sustainability coordinator

The parties must decide who verifies performance, how often and at whose cost. Annual external verification of KPI performance is standard for sustainability-linked deals. Lenders often appoint a sustainability coordinator to lead KPI negotiation and monitoring. The documents should define the coordinator's role carefully, so the borrower does not assume the coordinator gives advice and the lender group does not assume the coordinator has taken on liability for the targets.

What counts as a default

Market practice is that missing a sustainability target is not an event of default, and that misallocation of green loan proceeds results in the loan losing its label rather than becoming repayable. Lenders sometimes seek stronger remedies, such as mandatory prepayment of the green tranche if eligible spend is not achieved. Borrowers should resist provisions that convert reputational risk into refinancing risk unless the pricing reflects it.

Sovereign and public sector green finance

The UK government raises green financing through green gilts and retail green savings bonds under its Green Financing Framework, publishing allocation and impact reports. The framework is a useful reference point for corporate issuers designing their own frameworks, especially on eligible categories and exclusions.

Public bodies and development finance institutions are also active in co-financing renewable energy, grid and transport infrastructure. Projects that combine public money with private finance raise additional questions about subsidy control and procurement, which our project finance and renewable energy teams address.

How a sustainable financing comes together

1. Define the strategy. Decide whether a use-of-proceeds or sustainability-linked instrument fits the business, the funding need and the data available.
2. Build the framework. Draft a green, social or sustainability-linked financing framework setting out eligible categories or KPIs, governance, management of proceeds and reporting.
3. Obtain external review. Commission a second-party opinion, and agree the scope of any assurance over baseline data and future performance.
4. Calibrate KPIs and targets. For sustainability-linked deals, agree material KPIs, ambitious targets, baselines, recalculation triggers and the margin or coupon adjustment.
5. Document the transaction. Add sustainability provisions to the facility agreement or bond terms, including definitions, reporting covenants, verification and the consequences of non-reporting.
6. Market accurately. Check marketing materials, press releases and investor presentations against the framework and the anti-greenwashing rule.
7. Report and verify. Deliver allocation and impact reports or annual KPI performance reports, with external verification where the documents require it.

Documents and evidence to assemble

Lenders, investors and reviewers will expect a coherent document set. For a typical deal, green finance lawyers in London will work through:

• the financing framework, signed off at board or committee level;
• a second-party opinion and, where relevant, limited or reasonable assurance reports on baseline data;
• eligibility analysis for each project category, with any taxonomy alignment assessment needed for EU investors;
• KPI definitions, baselines, calculation methodologies and recalculation policies;
• sustainability provisions in the facility agreement or terms and conditions, including the sustainability coordinator's role and reporting covenants;
• internal processes for tracking proceeds, such as dedicated accounts or ledgers; and
• the transition plan, if the transaction is presented as transition finance, together with the evidence that supports it.

Facility documentation typically builds on the LMA's recommended forms. Our guide to the LMA facility agreement explains the base document that sustainability provisions are added to.

A green label is a public statement. Its value lasts only as long as the evidence behind it, and the legal risk grows with every report that repeats an unsupported claim.

Risks and common mistakes

The risks below are the issues that green finance lawyers in London see most often in negotiation and in later disputes.

Cross-border angle: Bangladesh, the EU, the Gulf and Asia

Sustainable finance is international by design. Lenders and investors in London regularly finance renewable energy, manufacturing upgrades and infrastructure in Asia and the Gulf, and businesses in those markets borrow in London to access a deeper pool of capital and investor demand for labelled instruments.

Bangladesh is a case in point. Its export manufacturers, particularly in ready-made garments, face growing pressure from European and UK buyers on emissions, energy efficiency and supply chain due diligence. Bangladesh Bank has developed sustainable finance policies for banks and financial institutions, and Bangladeshi borrowers can combine local refinancing schemes with English-law green or sustainability-linked facilities from international lenders. Our Dhaka office advises on the Bangladeshi regulatory side, and our UK–Bangladesh trade and finance team coordinates both.

For EU-facing deals, the EU Taxonomy, the Sustainable Finance Disclosure Regulation and the European Green Bond Standard may shape what investors require, even where the transaction is governed by English law. In the Gulf and in Singapore and China, local taxonomies and green finance guidelines affect eligibility and investor appetite. Where local law governs security or project assets, we work with local counsel.

How TRW & Co helps

As green finance lawyers in London, our focus is on making sustainability terms commercially workable and defensible. Typical workstreams include:

See the full range of our work on our practices page, or contact our London office to discuss a financing.

Checklist for decision-makers

Before launching a sustainable financing, check that green finance lawyers in London have helped you answer these questions:

• Does a use-of-proceeds or a sustainability-linked structure fit the business and its data?
• Is there a board-approved financing framework aligned with the relevant LMA or ICMA principles?
• Have KPIs been chosen for materiality and targets calibrated for ambition, with clear baselines?
• Are recalculation, verification and late-data provisions in the documents?
• Is there a robust process to track proceeds or measure performance from day one?
• Have marketing materials and press releases been checked against the anti-greenwashing rule and consumer law?
• Do any EU, Gulf or Asian investors need alignment with their own taxonomies or disclosure rules?
• Is the business ready for UK SRS-style reporting if it becomes mandatory?
• Who owns ongoing reporting, and is the assurance provider engaged?

Frequently asked questions

Sources and official materials

1. FCA PS23/16: Sustainability Disclosure Requirements and investment labels — Anti-greenwashing rule, labels and naming rules
2. UK Sustainability Reporting Standards (GOV.UK) — Final UK SRS S1 and S2 and next steps
3. Companies (Strategic Report) (Climate-related Financial Disclosure) Regulations 2022 — Climate disclosures for large companies
4. PRA PS25/25 and SS5/25: Managing climate-related risks — Updated PRA expectations replacing SS3/19
5. UK Government Green Financing — Green Financing Framework and allocation reports
6. Transition Finance Market Review — Recommendations for UK transition finance
7. LMA Sustainable Lending — Green, Social and Sustainability-Linked Loan Principles
8. ICMA Green Bond Principles — Voluntary guidelines for green bonds

General information only, current as at 21 October 2026. It is not legal advice and does not create a solicitor–client relationship. It reflects the law of England and Wales unless stated otherwise; Scotland and Northern Ireland have separate legal systems, and the law changes frequently. Check current official sources and take advice on the facts of your matter.