An independent reliability index for UK parcel carriers — built from real outcomes reported by real customers. No advertising. No carrier sponsorship. Just the data.
Last updated: 27 April 2026 · Methodology below
Reliability score = 100 minus the share of cases that ended in failure (lost, damaged, or false “delivered”). Higher is better.
⚠️ Carriers with low “confidence” have fewer than 10 reported cases — treat their score as preliminary.
Areas where customers most often report problems. We surface the data so retailers can route smarter and customers know what to expect.
Not enough postcode-level data yet. The map fills in as more cases are logged.
👉 Are you a retailer? See WIMP Route to plug this data into your shipping decisions automatically.
Patterns that consistently lead to better outcomes — regardless of carrier.
Neutral tips based on what works in similar conditions.
Source data: Cases logged voluntarily by UK customers through the WhereIsMyParcel.uk free tracking tool. No webscraping, no leaked data, no affiliate feeds. Each case captures the carrier, the postcode area, the reported issue, and — crucially — the eventual outcome.
Reliability score: 100 minus the percentage of cases that ended badly (parcel still missing, damaged, or false “delivered” scan). A score of 95 means roughly 1 in 20 reported cases ended in a problem; 70 means roughly 3 in 10.
Confidence: Carriers with fewer than 10 reported cases are flagged “low confidence”. We publish the number anyway for transparency, but you should weight it accordingly.
Selection bias — we’re honest about it: Our data skews toward cases where something went wrong (people don’t come to us when their parcel arrives fine). That means absolute failure rates here are higher than the population rate — but the relative ranking between carriers is meaningful, because every carrier has the same bias applied.
What we don’t do: We don’t take money from any carrier. Carriers can’t pay to improve their score. We don’t hide low-scoring carriers behind a paywall. The data is free for the public, and licensed at cost to journalists, regulators and Citizens Advice.
If you operate a carrier listed here and believe a case has been mis-categorised, you can request a review. Get in touch via the about page. We log every change, publicly.