The Ordinary Case

The solicitor's name was Karen Fielding and she had been sending work my way for three years. Small things, mostly. Disputed wills where the signatures had been digitally altered. Footage that claimed to be from one time and turned out to have been recorded at another. She did not deal in headlines. That suited us both.

She called on a Tuesday morning in February.

"I have a case," she said. "Not a complex one. A woman in Wrexham. Her benefits were terminated eighteen months ago. She wants someone to look at the paperwork and tell her why."

I asked what the system was.

She named it. WellPath Assessment Engine, contracted to process disability benefits across three local authorities from 2021 to 2024. Retired since, the contractor wound up.

"Straightforward, then," I said.

"Almost certainly. But Eleanor has been fighting this for eighteen months and the council keeps telling her the system made the right decision without being able to tell her what the right decision actually was. She deserves someone to look at it properly."

I said I would look at it.

I did not expect to find anything interesting. That, I had learned in my sixty-fifth year, is the condition under which interesting things most reliably appear.

I drove east to Wrexham the following Thursday. Karen met me outside. She was on the pavement when I arrived and she walked me through what she knew before we knocked. Eleanor Cross. Forty-one when the decision came through. Multiple sclerosis, diagnosed at thirty-four. Powered wheelchair. Karen said this last thing the way solicitors say things they want you to hold onto.

Karen knocked. Eleanor opened the door and looked at us both with the particular expression of someone who has been looked at by too many professionals. She nodded and reversed to let us in.

She had the documents ready on the table. Eighteen months of correspondence, printed and organised into folders with the month and year on each spine.

Karen sat to one side. I read. Eleanor brought tea at some point and I drank it without looking up.

The fourth folder contained the original termination letter from April 2023. It did not explain the decision. It described it. Eleanor Cross had been assessed using the WellPath criteria and her claim for Personal Independence Payment had been terminated with effect from the first of May. If she wished to challenge the decision, she could request a mandatory reconsideration within one month.

She had.

The reconsideration upheld the original decision. She appealed to the tribunal. The tribunal found in her favour on two of the three components but not the third, which was returned to the local authority for further consideration. The local authority referred it back to the contractor.

By then, the contractor had ceased trading.

I read the GP letters. Two of them. The occupational therapist's report as well.

"I had everything," Eleanor said.

"Yes," I said.

"What I cannot get anyone to tell me is what the system actually looked at. The form I filled in. Obviously. But what did it do with it? What did it weigh against what?"

I told her I had the same question.

I spent the next six weeks attempting to reconstruct how WellPath had reached its decision about Eleanor Cross.

When a human assessor makes a decision you can ask them about it. You can read their notes. You can trace the reasoning from the evidence through to the conclusion. Even poor reasoning leaves a trail.

A machine is different. A decommissioned machine is different again.

WellPath had been built by a company called Canmore Digital, with offices in Edinburgh and Birmingham. Canmore had been acquired in 2023 by a larger technology company. That company had later been broken up and sold in parts.

The team that built WellPath no longer existed. Three of the four lead developers I identified were working for different companies in different cities. The fourth had left the country.

I spoke to two of the three who remained. Both were cooperative. Neither could tell me what I needed to know.

The first, a man named Garrett, told me WellPath had used a weighted scoring system with approximately forty criteria drawn from the PIP assessment framework. Each criterion was assigned a weight based on training data drawn from historical benefit decisions. He explained this clearly and I understood it.

I asked which weight had been assigned to Eleanor's reported difficulty with mobility outdoors.

He could not tell me. The model weights had been held on Canmore's servers. Those had been decommissioned during the acquisition.

I asked whether the weights had been documented.

He believed they had been, in a technical specification now held with the acquiring company's archive.

The acquiring company referred me to their data retention policy. Technical specifications for decommissioned systems were held for two years, then deleted. WellPath had been decommissioned in 2024.

It was now February 2025.

I spent three days reading the documentation that had survived. There was a great deal of it. Impact assessments. Procurement reports. Equality impact assessments. Vendor due diligence records. Oversight committee minutes.

Each document made slightly different claims. Together they said much the same thing.

WellPath had been rigorously tested. WellPath had undergone independent validation. WellPath had been audited every quarter. WellPath met or exceeded every applicable standard.

None of it said what WellPath had actually done.

There was one exception.

The minutes of an oversight committee meeting from September 2022 contained a reference I could not place. Item seven recorded approval of a data-sharing agreement with a third-party analytics partner, identified only as CCP-Integration Ref. 4471. No company name. No description of its purpose. The surrounding items concerned procurement compliance and audit scheduling.

I looked for CCP-Integration Ref. 4471 throughout the rest of the documentation. It did not appear again.

The minutes had been generated from a template. It was possible the reference had been carried over from another document. I noted it and moved on.

I called Karen on a Friday afternoon.

"So there's nothing," she said.

"There is a great deal. There just is not what I need. The record of what the system was supposed to do is extensive. The record of what it actually did is gone."

She was quiet for a moment. "Can you say it was wrong?"

"I can say Eleanor's GP and occupational therapist both documented difficulties that should, under the published criteria, have produced a different score. I can say the system was described as giving appropriate weight to professional medical opinion. I cannot verify that it did. The model is gone."

"That's not nothing."

"It is not nothing. But it is not what Eleanor needs."

I drove back to Wrexham the following week. Karen was already there when I arrived.

Eleanor was at the table. The folders were still there.

I sat down and told her what I had found, which was not the same as what I had hoped to find. The model was gone. The documentation described a system without explaining it. I had evidence that her case should have been assessed differently under the published criteria. I could not prove the system had assessed it wrongly, because there was nothing left to assess.

She listened without interrupting. When I finished she was quiet for a moment.

"Do you believe me?" she asked.

"Yes," I said.

"But you can't prove it."

"I cannot prove what the system did. I can show that the outcome is inconsistent with the criteria as written. That is not the same thing."

She nodded. Not satisfied. Not surprised.

"Eighteen months," she said.

Karen looked at the table. I looked at the folders. Outside a van reversed and someone sounded a horn.

The WellPath engine had made a decision about Eleanor Cross in April 2023 and had taken its reasons with it when it was switched off. What remained were reports saying it had been careful and documents saying it had been fair. The explanation remained. The thing that explained it did not.

I had encountered that before. Not with machines.

I drove home through a pale March afternoon. The Clwydian Hills still held snow on the high ground. I joined the A55. West of Flint the Dee Estuary opened out and, beyond that, the coast carried me the rest of the way home. The water was flat and grey. The Great Orme stood ahead on the headland.

I got home before dark. I put the kettle on.

I spent the following two weeks preparing my report and sent it to Karen. She used it to support a fresh application to the tribunal.

Six weeks later, Eleanor Cross's third component was reinstated. The tribunal had not decided the system was wrong. It had decided the authority could no longer demonstrate that it was right.

It was not an answer. It was the end of the question. For Eleanor, those had become the same thing.

I had thought Eleanor Cross was an ordinary case. She was. But ordinary cases, I have found, are only ordinary until the next letter arrives.

My name is Aris Thorne. I investigate computer crimes for a living. Most people believe a machine's decision ends when the machine is switched off. They are wrong. Decisions outlive the systems that made them and someone, somewhere, must still answer for them.