What to include in a UK grant letter of support

A support letter explains who backs your project, what they know first-hand and why the proposed work deserves funding.

Chasing a signature while juggling meetings, service delivery and home life? You need useful evidence without turning another document into an evening’s work.

Start by being clear about what the letter needs to prove.

What is a grant letter of support?

A third-party endorsement backs up claims in an application with another person’s knowledge, experience or evidence.

The writer should explain their relationship to you, endorse the proposed project and show why their support is credible. A good letter connects the need, your response and the funder’s priorities.

The practical job is to choose the right writer, give them a clear brief and collect a signed letter that aligns with your grant application. The structure below gives you a starting point.

Key takeaways

• Ask someone with direct knowledge of the project, community or delivery partnership.
• Give them the project details, funder priorities and a clear return date.
• Use relevant, current evidence instead of general praise.
• Keep endorsements separate from confirmed commitments of money, staff time or premises.
• Read every letter alongside the application and budget before submission.

Start with the funder’s requirements

Before asking anyone to write a grant support letter, check whether the scheme requires letters of support, permits optional attachments or limits supporting documents. A well-written attachment achieves little if the application process doesn’t accept it.

Use the guidance for the specific programme you’re applying to. For example, the National Lottery Heritage Fund’s application guidance sets out the requirements for its particular funding programme. Another scheme may ask for something different.

Record the permitted number of letters, format, signatory requirements and submission route in your application plan. Give writers those instructions upfront.

The terminology also matters. An endorsement expresses support. A commitment letter confirms promised resources. A support letter may be an endorsement, while a memorandum of understanding records agreed roles and responsibilities; its legal effect depends on its wording. A reference usually focuses on past performance.

Those boundaries aren’t universal. UKRI’s EPSRC project-partner letters, for example, confirm commitment to the project.

So go by what the funder needs the document to do, whatever it’s called.

Who should write your letter?

The strongest writer is usually the person who can offer specific, relevant evidence. Seniority alone won’t do that job.

Partners, community voices and specialists

Typical writers include partner organisations, community leaders, public officials, current or former beneficiaries and relevant industry experts.

For a healthcare project, a referral partner may understand the service gap better than a distant senior figure. For community work, someone involved in developing the proposal can explain how local views shaped it.

Individuals and family members

For an individual applicant, a tutor, employer, project partner or community organiser may provide relevant support in a letter of support.

A family member may know the circumstances well through personal connection, but their relationship should be disclosed. Their letter provides different evidence from an independent professional endorsement.

Only use personal letters where the scheme permits them. A heartfelt account cannot replace an eligibility requirement or a required professional reference.

Beneficiaries should participate freely and understand how their words will be used. Support should never depend on agreeing to provide a letter.

What to include in a letter of support

The best letters answer two questions: why should the reader trust this writer, and what does their evidence add?

Establish the writer’s authority

Include the writer’s name, role, organisation and contact details. Explain how they know you, how long the relationship has existed and what they have observed directly.

A local referral partner can describe unmet demand. A community representative can explain participation barriers. A delivery partner can discuss practical arrangements.

Keep the writer within their knowledge. Someone who has attended one event can’t credibly endorse your entire financial management system.

Endorse the project with evidence

The main content should be evidence-based and:

• Name the project and grant programme.
• Explicitly support the proposed project.
• Explain the need the writer recognises.
• Give a relevant example, result or dated piece of evidence.
• Connect the work to the funder’s priorities.
• Describe any agreed role or contribution accurately.

Include a date, signature and an invitation to contact the writer.

Where figures appear, give the period and source. Referral numbers, consultation findings and outcomes from previous joint work are useful when they relate to this proposal.

The project description should match your grant project plan. If the plan changes, the supporting letter may need changing too.

One page is a sensible drafting target, and two pages should be rare. Leave the organisation’s full history for another document.

Make the evidence specific

“We think they do excellent work” is pleasant. It gives the assessor very little to examine.

A more convincing sentence follows this pattern: “During XX (period), our service referred XX (number) people to XX (applicant) for XX (support), because XX (documented gap).”

The completed sentence needs real records behind it. Don’t add impressive-looking figures because the paragraph feels thin.

Show what the evidence establishes

A referral total can demonstrate demand. Feedback may show that people found an activity accessible. A lasting health outcome needs longer-term evidence than either of these.

Keep the conclusion within what the evidence supports. Explain limitations where they matter, including small samples or incomplete follow-up.

Relevant local knowledge often adds more than another national statistic. Give that knowledge a source, date and clear connection to delivery.

Confirm resources separately

Support for a project and a commitment of resources are two separate things, so record them separately.

If they promise cash, record the amount, purpose and payment dates. For donated time or premises, state the hours or units, valuation, project dates and conditions.

If a venue contribution covers 20 workshops, the workplan and budget should also show 20 workshops.

If a partner is providing a free venue, funded post or cash contribution, the letter needs to confirm that commitment in writing.

Your organisation still needs the appropriate approvals for its own costs and promises.

How to request letters without a deadline scramble

Ask for a letter of support at least two to three weeks before submission, with a return deadline allowing 10 to 14 calendar days. Leave time afterwards for corrections and approval.

A busy partner’s signature has a remarkable ability to become unavailable precisely when you need it.

1. Build a relevant contact list. For a partnership-heavy application, a longlist of 15 to 20 organisations can help you identify suitable voices. Treat it as a planning pool and request only the letters of support the application needs and permits.
2. Send a short request pack. Include an organisation overview, the grant name, a one- or two-sentence project description and the relevant funder priorities. Add the relationship you hope they can discuss, any evidence available, formatting instructions, the return date and who to send it to.
3. Track progress in a spreadsheet. Record the contact, request date, return deadline, reminder date, signatory and whether the signed version has arrived. Set your own review date before the submission deadline.

An outline helps. Identical letters with different logos are less useful.

Offer factual background and sentence starters, then ask each writer to approve wording that reflects their own knowledge. Never send a letter under someone’s name without their approval.

If you already have a personal connection with a writer, explain why their particular perspective matters. That makes the request clearer than “Please could you write something supportive?”

How to structure your letter

Choose the structure that best fits the writer’s evidence. A technical partnership letter doesn’t need a personal story.

Problem, solution and impact

Start with the need the writer sees. Explain how the proposed project responds, then describe the expected change.

This works well for referral partners and community organisations. Keep the outcome proportionate to the activity. A short programme may improve access or confidence, but it can’t credibly promise to remove every barrier participants face.

Personal connection

Explain the writer’s relationship to the work, describe an experience they can discuss and connect it to the proposal.

This can suit beneficiaries or community representatives. Protect privacy and keep the story relevant. Personal detail should help the scheme understand the need, and nobody should feel they have to share distressing experiences to provide it.

Evidence-based support

Lead with a relevant observation, service result or finding. Explain its source and what it supports.

For a heritage proposal, relate that evidence to the National Heritage Memorial Fund’s application questions so the letter speaks to what that funder is assessing.

A grant letter of support template to adapt

Use this template to prepare a support letter based on the writer’s own evidence. Replace each XX with approved facts and remove anything that doesn’t apply.

XX (writer’s organisation or contact address)
XX (date)

Dear XX (named contact or funding panel),

Re: Support for XX (project title), XX (grant programme)

I am XX (name), XX (role) at XX (organisation). We have worked with XX (applicant) since XX (date) through XX (relationship or activity). My role involves XX (relevant responsibility), which gives me direct knowledge of XX (relevant issue).

I support XX (applicant)’s application for XX (project title). The proposed XX (activity) will support XX (beneficiaries) in XX (place) by addressing XX (defined need).

Our evidence of this need includes XX (dated observation, referral information, consultation finding or service data). This shows XX (what the evidence establishes), and the proposed activity responds through XX (practical response).

The project relates to XX (funder priority) because XX (clear connection between activity and intended outcome).

Our experience of working with XX (applicant) includes XX (relevant example and evidenced result). This supports our confidence in XX (particular aspect of delivery).

Where applicable: Our approved contribution is XX (resource), available during XX (dates), subject to XX (conditions).

We support this proposal and can provide further information about the evidence or commitments described above.

Yours sincerely,

XX (signature)
XX (name, role, organisation, email and telephone)

The writer should read the finished version alongside the project summary. Their signature confirms their support for those words, including any contribution described.

Common mistakes to avoid before submission

An impressive signatory with no connection to the project can add less than a detailed letter of support from a working partner. Ask what each writer adds that the application can’t establish alone.

Repeated wording across letters of support can obscure the different perspectives you need.

Formatting matters too. Use readable text, consistent project names and complete contact details. Keep an approved version and submit the signed copy in the required format.

Missing dates, outdated project descriptions and promises beyond the budget create avoidable questions. Your grant due diligence documents should support the letters, so the evidence tells one consistent story.

Leave time for a final read. Submission anxiety can make small inconsistencies easy to miss.

At Bidsmithery™, our grant application review and support checks the developed application against the funder’s requirements. We help identify gaps between the evidence, delivery plan and commitments, so you’re not facing the final review alone.

Frequently asked questions

Give yourself a stronger final check

A well-chosen support letter makes the connection between need, evidence and delivery easier to follow. It also gives you fewer loose ends to carry into submission day.

Book a fit check call if you’d welcome a grounded conversation about your live application before it goes in.

A win brings relief, then delivery and the next application. External red review is a sensible safeguard that protects your energy, confidence and headspace.