UK broadband complaints and minimum speeds
Contact your provider first and make a formal complaint if the issue remains unresolved.
What to check
For participating providers, check the minimum guaranteed download speed and its conditions. An advertised average is different. Keep the complaint date, reference and plan wording.
What to do next
Eligible customers can use the provider’s approved independent dispute resolution scheme after six weeks or earlier with a deadlock letter. Verify current eligibility and membership.
Official source
Ofcom: complaint and ADR guidance
Sources checked 3 November 2026. Rules, contracts and complaint routes can change. Check official guidance for your circumstances.
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Slower than advertised · Wi-Fi and Ethernet · Packet loss and latency · Complaint letter · Rights updates