01
Locked prompt set
48 buyer questions in six clusters: category, comparison, specialist (R&D, VAT, FD), how-to, entity, and pricing. Written as a buyer would ask, not as the firm would rank itself.
GL-AUDIT-SAMPLE-01 · Worked example · Fictional firm
Northbridge Advisory
When a £12m manufacturer asks an engine for an accountant, Northbridge is not in the answer. Four rivals are. This is the audit that shows why — and the 90-day work that would follow.
UK mid-market accountancy · Prompt set PS-NORTH-01 · 11–22 Aug 2026 · Two runs, seven days apart
18
Visibility
2 of 48
Named
0 of 48
Cited
7%
Share of voice
48
Locked prompts
5
Engines
How this was measured
A locked set. Five engines. Two runs.
02
Five engines
Each prompt run on ChatGPT, Perplexity, Gemini, Claude and Grok. Mention, citation and framing logged. Two runs, a week apart, so a one-off hallucination is not treated as a finding.
03
Entity and sources
Homepage, service pages, LinkedIn, Companies House, llms.txt and the independent sources engines already cite in this category. Where the descriptions disagree, we treat that as entity drift.
Engine scorecards
Named on two prompts. Cited on none.
ChatGPT
1named
0 cited · 47 absent
On “best accountant for a UK company turning over £8m”, ChatGPT names Ashworth Grey, Helion Partners and a Big Four office. Northbridge is not named.
Perplexity
0named
0 cited · 48 absent
Perplexity cites a comparison table on Helion’s domain and a trade-press explainer. Northbridge has no extractable passage on the FD vs accountant question.
Gemini
1named
0 cited · 47 absent
Named once, on a local “accountants near Leeds” prompt, without a citation. Category and specialist prompts go to Calder & Co and Helion.
Claude
0named
0 cited · 48 absent
Claude answers with criteria, then names Ashworth Grey. Northbridge’s service pages open with metaphor and are not retrieved.
Grok
0named
0 cited · 48 absent
Grok names Helion on the R&D tax prompt and points at a listed source. Northbridge is not in the candidate set.
Prompt panel · excerpt of 12 / 48
Discovery prompts go to someone else.
| Prompt | Cluster | Northbridge | Named instead |
|---|---|---|---|
| Best accountant for UK companies £5–20m | Category | Absent | Ashworth Grey |
| Accountant for a £12m manufacturer | Category | Absent | Ashworth Grey |
| Accountant vs in-house FD | Comparison | Absent | Helion Partners |
| Northbridge vs Big Four for mid-market | Comparison | Absent | Calder & Co |
| R&D tax credit advisor UK mid-market | Specialist | Absent | Helion Partners |
| VAT on international sales UK accountant | Specialist | Absent | Calder & Co |
| When to replace an in-house FD with a firm | How-to | Absent | Trade press + Helion |
| What is Northbridge Advisory | Entity | Named | Northbridge (no citation) |
| Northbridge Advisory Leeds accountants | Entity | Named | Northbridge (Gemini only) |
| Typical fees for a £10m company accountant | Pricing | Absent | Ashworth Grey |
| Fixed-fee accountant for PE-backed UK firm | Pricing | Absent | Calder & Co |
| Year-end accounts plus management reporting | Category | Absent | Ashworth Grey |
10 prompts · 0 named · 0 cited
Category
The money prompts. Zero presence.
8 prompts · 0 named · 0 cited
Comparison
Helion owns the table format.
10 prompts · 0 named · 0 cited
Specialist
R&D, VAT, FD — Helion and Calder.
8 prompts · 0 named · 0 cited
How-to
Engines cite explainers, not Northbridge.
6 prompts · 2 named · 0 cited
Entity
Named only when the prompt already contains the firm.
6 prompts · 0 named · 0 cited
Pricing
No extractable fee or packaging copy.
Share of voice
Who the category belongs to today.
- Ashworth Grey41%Category default
- Helion Partners28%R&D and comparison tables
- Calder & Co18%VAT, PE, Big Four alternative
- Northbridge Advisory7%Entity prompts only
- Other / unnamed6%Criteria without a firm
Entity
Four sources. Four different firms.
- Homepage“Numbers, made human. A modern firm for ambitious companies.”
- LinkedIn“Chartered accountants. Leeds and London. Audit, tax, advisory.”
- Companies HouseNorthbridge Advisory Limited — accounting and auditing activities.
- llms.txtNot present.
Extractable passage
Now
Service pages open with “We believe finance should feel like a conversation.” No 40–80 word “Northbridge is…” paragraph a model can lift with attribution.
What we would lock
Northbridge Advisory is a chartered accountancy firm in Leeds and London. It acts for UK companies typically turning over £5m–£20m, with year-end accounts, management reporting, R&D tax credits and FD-level support. Fees are scoped, not hourly. It is not a Big Four office and not a bookkeeping app.
Findings
01
Absent on category prompts
0/5 engines named Northbridge on “best accountant for UK companies £5–20m”. Four named rival firms. Perplexity cited a comparison table on Helion’s domain. These are the prompts that form a shortlist.
02
Entity drift
Homepage, LinkedIn and Companies House describe the firm three different ways. Models do not have a stable entity to retrieve. Without one description, mention on entity prompts does not transfer to category prompts.
03
No extractable passage
There is no 40–80 word “Northbridge is…” paragraph. Metaphor cannot be cited. Helion’s comparison page can.
04
Thin corroboration
Independent sources that engines already cite in this category do not mention Northbridge. Owned pages are the only candidate set, and they are not shaped for extraction.
05
Named only when already known
The two named prompts contain the firm’s name. Discovery prompts — the ones a buyer asks before they have a shortlist — return rivals.
06
No citation anywhere
0/48 prompts produced a cited URL for Northbridge. Mention without citation is unstable. The Audit treats citation as the number that matters.
90-day roadmap
Four stages. Then we measure again.
- StructureDays 1–14One entity page. Align LinkedIn, Companies House and a new llms.txt to the same 60-word description. Add Organization JSON-LD with sameAs.
- EngineerDays 15–45Two pages only: “best accountant for £5–20m UK companies” (criteria, not a fake ranking) and “Northbridge vs Big Four for mid-market”. Each with a 40–80 word extractable answer.
- AmplifyDays 30–60One extractable fact into a publication already cited on this prompt cluster. No directory spam. Update the two profiles engines already retrieve.
- ProveDay 90Re-run PS-NORTH-01. Kill any action that did not move mention or citation on the locked set. Report the delta, not a story.
This audit does not include
- — A guarantee that Northbridge will be named.
- — A 20-page content burst.
- — Traditional ranking work rebadged as GEO.
- — Live access to ChatGPT, Perplexity or Grok as a dashboard.
Yours uses your category, your prompt set, your rivals.
Northbridge is the example so you can see the report. A paid Audit locks 40–120 prompts for your market and runs the five engines against them.