Deadlines don't negotiate. Neither do we.
Sentinel runs the compliance work that sits between your accountant and your solicitor.
We run the work that sits between your accountant, your solicitor, and the regulators who don't wait.
What Sentinel does.
Four operational pillars, run by a small team of compliance operators, augmented by document intelligence systems.
What Sentinel is not.
Clarity protects the engagement. These are the lines we do not cross — and the work we will not duplicate.
Not your accountant.
We don't file your tax return. Your accountant does. We make sure they have what they need, on time, every time.
Not your solicitor.
We don't give legal advice. Your solicitor does. We make sure the contracts they draft are stored, versioned, and surfaced when they expire.
Not software.
There is no login to learn, no dashboard you have to maintain. People run the work. The dashboard is a window into it, not a tool you operate.
Not your accountant.
We don't file your tax return. Your accountant does. We make sure they have what they need, on time, every time.
Not your solicitor.
We don't give legal advice. Your solicitor does. We make sure the contracts they draft are stored, versioned, and surfaced when they expire.
Not software.
There is no login to learn, no dashboard you have to maintain. People run the work. The dashboard is a window into it, not a tool you operate.
Built for UK businesses.
Operators across construction, agencies, e-commerce, hospitality, professional services, and light manufacturing already use the same compliance machinery we deploy for every client.
If you operate in the UK, Sentinel applies to you.
Your compliance position, in one frame.
A single operational view of your compliance score, active alerts, upcoming deadlines, document vault, and regulatory exposure — updated continuously by the team that runs it.
Open sample dashboardLow · monitored
2 items pending client review · next call 18 MAR
- Updated VAT penalty point notice published — applied to upcoming Q1 return.
- Confirmation Statement window opens in 26 days. Pack pre-assembled.
VAT Return Q1 2026
07 MAY 2026
PAYE / NIC March
22 APR 2026
Confirmation Statement
02 APR 2026
How it works.
Onboard
Discovery, audit, and document ingestion in week one.
Monitor
Continuous tracking of deadlines, filings, and regulation.
Review
Monthly call, written summary, quarterly risk report.
Onboard
Discovery, audit, and document ingestion in week one.
Monitor
Continuous tracking of deadlines, filings, and regulation.
Review
Monthly call, written summary, quarterly risk report.
What falls through the gap.
Your accountant files. Your solicitor advises. Neither of them is paid to watch the calendar between them. This is what gets missed.
| REF | Failure mode | Consequence |
|---|---|---|
| GAP-01 | Confirmation Statement missed at Companies House. | £150 penalty + strike-off risk |
| GAP-02 | ICO data protection fee lapses unnoticed. | Up to £4,350 fine |
| GAP-03 | Employer's Liability certificate expires mid-year. | £2,500 / day HSE fine |
| GAP-04 | VAT MTD penalty points accumulate quietly. | £200 per breach over threshold |
| GAP-05 | New regulation lands and goes unread for months. | Discovered at audit, not at publication |
Confirmation Statement missed at Companies House.
£150 penalty + strike-off riskICO data protection fee lapses unnoticed.
Up to £4,350 fineEmployer's Liability certificate expires mid-year.
£2,500 / day HSE fineVAT MTD penalty points accumulate quietly.
£200 per breach over thresholdNew regulation lands and goes unread for months.
Discovered at audit, not at publication
What happens next.
Four stages between today and a live engagement. Nothing hidden.
Personal response.
We respond personally with a confirmed slot or a clarifying question. Never an auto-reply.
Working call.
We map your current obligations and the gaps between your accountant, solicitor, and the regulators.
Written scope.
A short scope document. Onboarding plan, monthly cadence, and engagement fee. No deck, no theatre.
Baseline complete.
Discovery, document ingestion, and your first compliance baseline complete inside week one.
Begin the conversation.
Crownix® Sentinel operates as a discreet engagement. We onboard a small number of clients each month. A discovery call sets fit and scope.