Step 1

Understand your credit files

You cannot fix what you cannot see.

The most common mistake people make is checking a single "credit score" on a phone app and assuming they have the full picture. Your score is a marketing product; your data is the legal record lenders actually use. To begin this process, you must move from being a "subscriber" to being an "auditor."

A) The Three-Agency Reality

In the UK, there is no such thing as a "Credit File." There are three separate files maintained by three separate companies: Experian, Equifax, and TransUnion.

Lenders often report to only one or two of these. This means you might have a "Clean" file on Experian while an "Incorrect Default" on Equifax is quietly blocking your mortgage application.

  • The Rule: You must obtain and audit all three files simultaneously.

B) Scores vs. Data

Banks and lenders do not see your "score" (e.g., 720/999). They see a raw data feed of dates, balances, and status markers.

  • A "Score" is an opinion generated by the agency to sell you credit cards.

  • Data is the factual record of your financial history.

    We ignore the score. We focus entirely on the accuracy of the status markers (the 0s, 1s, Ds, and Ss) and the dates they were applied.

C) Accessing Credit File Data for Free

You do not need to pay for "Premium" subscriptions to see your data. Under the Data Protection Act 2018, you have a right to your Statutory Credit Report for free.

All three of the agencies have an app that you can use to access your credit file and this is updated at least every 30 days. Paying a subscription allows access to elements such as daily updates in some cases and “credit insights” but you should evaluate whether you really need this, and the “insights” which are often just credit agency interpretations, and not truly reflective of lender models.

Experian: Use the Experian app (Statutory report is free)

Equifax: Use ClearScore for a dashboard view, but always request your Statutory Report directly from Equifax for the granular legal data.

TransUnion: Use Credit Karma for daily updates, or request the statutory report via the TransUnion website.

An fairly useful aggregator that combines all three agencies together and allows daily updates in real time is CheckMyFile however, this requires a subscription beyond the initial 30-day free trial.

D)The "Audit" Mindset

Once you have your reports, you aren't looking for "bad news"—you are looking for procedural failures. On every adverse entry, ask yourself:

  • Is the Default Date accurate? (It should usually be 3–6 months after your first missed payment)

  • Is it reported consistently? (Is the balance and other data the same on all three agencies?)

  • Is the lender still active? (Entries from dissolved firms like are often the easiest to remove)

Next Step

Once you have all three reports in front of you, move to Step 2: Identify Harm, where we begin the process of categorising these errors into "Clinical Challenges."