Deadlock letters explained: the key to the UK ombudsman
What a deadlock letter is, when to ask for one, and what to do if your provider refuses.
2 Nov 2026 6 min read
United Kingdom · Energy
Billing errors, meter disputes, missed appointments and disconnection threats. Find your supplier's complaint route and the regulator that can make it act.
Most providers must issue a deadlock letter or let eight weeks pass before an ombudsman will take your case.
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Escalation
Only escalate after giving the provider a chance to fix the issue and keeping a record of dates, reference numbers and evidence.
Common questions
Usually yes. A complaint does not normally block a switch, and the new supplier handles the transfer. Keep the complaint open with the old supplier, especially if money is owed or a final bill is disputed.
It can require an apology, a clear explanation, corrective action and a financial award where the supplier got things wrong. Awards are decided case by case, so keep receipts and evidence of any loss.
No. The price cap limits the unit rate and standing charge on a default tariff, not the total you pay. Your usage still drives the final amount. Compare the rates on your bill with the published cap for your region and payment method.
Playbooks
What a deadlock letter is, when to ask for one, and what to do if your provider refuses.
2 Nov 2026 6 min read
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Eligibility, evidence, timelines and what the Energy Ombudsman can actually award.
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A one-page structure that works with telecom, energy and water providers in every market — plus the mistakes that get letters ignored.
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A no-show engineer is more than an inconvenience. Here is how compensation works in each market.
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