Who do customers actually complain about?
Every figure on this site is a verbatim regulator number with full attribution. No fudging, no modelling. Pick a sector below to see the league table — or read the methodology first.
Data last updated: UK regulators (Ofcom, Ofgem, CAA)
- Sectors live
- 6
- Refreshed
- Quarterly
- Licence
- OGL v3.0
Across telecoms, energy & aviation
Crons run after every regulator publication
Republish freely with attribution
Browse by sector
Each league table is sourced verbatim from its regulator’s published dataset.
Airline complaints
LivePer-airline complaint volumes, uphold rates and ADR awards. Sourced from CAA passenger complaints publication.
- Regulator
- Civil Aviation Authority (CAA)
- Cadence
- Annual + quarterly snapshots
- Latest
- FY25
Data last updated: Civil Aviation Authority
OpenBroadband complaints
LiveBroadband complaints per 100,000 subscribers across the UK’s biggest providers.
- Regulator
- Ofcom
- Cadence
- Quarterly
- Latest
- Q3 2025
Data last updated: Ofcom
OpenMobile complaints
LivePay-monthly mobile complaints per 100,000 subscribers, ranked from fewest to most.
- Regulator
- Ofcom
- Cadence
- Quarterly
- Latest
- Q3 2025
Data last updated: Ofcom
OpenPay-TV complaints
LivePay-TV complaints per 100,000 subscribers, refreshed each quarter.
- Regulator
- Ofcom
- Cadence
- Quarterly
- Latest
- Q3 2025
Data last updated: Ofcom
OpenLandline complaints
LiveUK landline complaints per 100,000 subscribers, still tracked every quarter.
- Regulator
- Ofcom
- Cadence
- Quarterly
- Latest
- Q3 2025
Data last updated: Ofcom
OpenEnergy supplier complaints
LiveComplaints per 100 accounts and next-day resolution rates for UK energy retailers.
- Regulator
- Ofgem
- Cadence
- Quarterly
- Latest
- Q3 2025
Data last updated: Ofgem
OpenFinancial Ombudsman uphold rates
Coming soonPer-firm case volumes and uphold rates across banking, insurance, mortgages and credit.
- Regulator
- Financial Ombudsman Service (FOS)
- Cadence
- Half-yearly
FCA firm complaints
Coming soonComplaints per 1,000 customers reported by regulated firms across product categories.
- Regulator
- Financial Conduct Authority (FCA)
- Cadence
- Half-yearly
Public methodology, no secret sauce
Every star, badge and ranking on the index is computed from the same regulator data you can download. The full formula is public — if you have the source numbers, you can reproduce every figure on this site.