Independent · CPR Part 35 compliant

Get a professional quantum calculation

When your claim turns on numbers — secret commission, energy mis-selling, pension transfer shortfall, mortgage redemption interest — you need an independent, qualified expertto calculate what you've lost. A spreadsheet from the claimant doesn't carry weight at court. A signed expert calculation does.

When you need a professional calculation

  • Business energy mis-selling

    Recovery of contractual overpayments + interest under Wood v Commercial First, plus annexures setting out the supplier's secret commission.

  • Plevin / s.140A claims

    Quantification of undisclosed commission, total amount of credit, the tipping point ratio, and statutory interest.

  • Pension transfer loss

    Defined-benefit vs defined-contribution counterfactual modelling — the gold standard in pension mis-sale claims.

  • Mortgage shortfall / interest

    Compound vs simple interest modelling, statutory rate (s.69 CCA), and reconciliation against payment history.

  • Investment loss

    Suitable counterfactual portfolio modelling, with FOS-style methodology, ready for FOS or court.

  • Disrepair / damages

    Schedules of loss with photographic evidence cross-referenced and proportionality argued.

How the calculation service works

  1. You upload your contract / advice / suitability paperwork via the secure intake link below.
  2. The Rivermead Partnership (UK expert-witness firm) reviews the documents.
  3. You receive a fixed-fee quote within 1 working day — no surprises.
  4. On instruction, you get a signed CPR 35-compliant calculation report (typically 5–15 working days).
  5. The report is yours to use — share it with whichever solicitor or adviser you take it to.

CPR 35.3 — the expert's duty to the court

The calculation is independent. Under Civil Procedure Rule 35.3, the expert's duty is to the court — not to the party that instructs them. We cannot promise a particular answer, only an honest one. That's what makes the calculation admissible.

Ready to get started?

Log into AI Lawyer with a quick summary of your matter. We'll triage whether a professional calculation makes commercial sense and give you a fixed-fee quote within one working day.

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