Personalised UK Complaint Letters by Sector

Choose your sector, then your brand and situation, and generate a calm, factual complaint letter in minutes. One-off £3. No account required.

ClearComplaint generates structured, personalised UK complaint letters based on your specific situation. Browse by sector below to find common scenarios and company pages, then generate a professional letter tailored to your facts.

Airlines Mobile & broadband Retail Banking Energy & utilities Insurance Travel Rail Water Couriers Credit Cards

Browse sectors Generate now (£3) Tip: sector hubs lead to brand pages and common scenarios.

How to complain to a company in the UK

In the UK, a formal complaint should clearly explain what happened, include relevant dates and reference numbers, and specify the outcome you are seeking. A structured complaint improves the likelihood of a timely and meaningful response.

Many sectors — including telecoms, banking, energy and airlines — have defined complaints procedures. If your issue is not resolved within a reasonable timeframe, you may be entitled to escalate your complaint to an independent ombudsman or regulator.

Browse by sector below to find guidance and generate a structured complaint letter tailored to your specific situation.

How it works

Follow these three steps, then choose the sector closest to your complaint.

1) Pick a sector

Start with the closest match for your complaint

2) Choose a brand or scenario

Select what happened: billing, delays, refunds, service issues and more

3) Generate your letter

Receive calm, factual, professional wording for a one-off £3

Browse sectors

Choose the sector closest to your complaint to reach relevant brand pages and common scenarios.

Airlines (17)

Delays, cancellations, refunds, baggage, service issues

Mobile & broadband (14)

Bills, outages, contract disputes, cancellations, poor support

Retail & online shopping (8)

Late delivery, missing items, refunds, faulty goods, returns

Banking & finance (19)

Chargebacks, account issues, fees, fraud handling, escalation

Energy & utilities (6)

Billing errors, meter disputes, switching problems, service issues

Insurance (13)

Claims taking too long, claims rejected, settlement amount disputes

Travel (8)

Refund taking too long, cancellation dispute, booking error disputes

Rail (2)

Delay disruption, cancellation dispute, accessibility issues

Water (7)

Incorrect bill, water meter dispute, leak or sewerage problem

Couriers (8)

Parcel marked delivered, not received, parcel damaged

Credit Cards (5)

Disputed transactions, chargebacks, unauthorised payments

If you already know the company, use the relevant sector hub to find the brand page quickly.

Escalating a complaint in the UK

If a company fails to respond or resolve your complaint, you may be able to escalate the issue to an independent body. The appropriate escalation route depends on the sector.

Telecoms complaints may escalate to Ofcom-approved dispute resolution services.
Banking and financial complaints may escalate to the Financial Ombudsman Service.
Energy complaints may escalate to the Energy Ombudsman.
Airline disputes may involve alternative dispute resolution schemes.

A clear, structured complaint letter strengthens your position if escalation becomes necessary.

Frequently asked questions

What should I include in a UK complaint letter?

Include a brief summary of what happened, key dates, any reference numbers (account, order, booking), what you have already tried, and the exact outcome you want (refund, correction, compensation or apology).

Can I complain by email instead of sending a letter?

Yes. A formal complaint email can use the same structure as a letter. Keep it calm and factual, attach relevant evidence, and ask for a written response.

How long should I wait for a company to respond?

Timeframes vary by sector and company, but you should expect an acknowledgement and a substantive response within a reasonable period. If your complaint is not resolved, check the firm’s complaints process and consider escalation where applicable.

When can I escalate a complaint to an ombudsman or regulator?

If the company does not resolve your complaint, you may be able to escalate to an independent dispute resolution service, ombudsman or regulator depending on the sector (for example telecoms, banking and energy).