A claimant book has a value. Somebody has to calculate it
A claimant book is an operational asset. It is also a financial one. Its size determines the claim. Its composition determines the distribution. Its quality determines what a funder is willing to underwrite.
Mediatasks builds and operates that book. We do not hold ourselves out as quantum experts, and we will not pretend the two skills are the same one.
Participation produces the population. Quantum tells you what it is worth.
Four ways a strong case is under-valued
None of these are participation failures. All of them are decided long before settlement, and usually by whoever happened to be in the room.
Quantum arrives late
Strategy is set on an estimate, then the analysis is asked to agree with it.
The book grows unmodelled
Cohorts are added without anyone measuring what they add to the claim.
Distribution designed under pressure
Allocation methodology is built at settlement, on incomplete data, against a clock.
Funder questions land in the wrong place
Loss methodology is put to a legal team rather than an analytical one.
Practising law differently
Punter Southall is a London firm of corporate solicitors, built around long client relationships rather than billable throughput. Its own description of itself is the useful one: part of a wider team of experts of different kinds — in law, finance and risk — who help organisations make better decisions.
That combination is why the engagement makes sense. The analytical depth sits next to the legal practice, in the same building, on the same matters.
- Firm
- Punter Southall — corporate solicitors
- Base
- London
- Practice
- Corporate and M&A · governance and compliance · dispute resolution · commercial and IP · employment
- Depth
- Data protection and privacy, data breaches, cybersecurity, investigations, AI governance
- Group
- Part of a wider Punter Southall network spanning law, finance and risk
- Regulation
- Regulated by the Solicitors Regulation Authority
- Reference
- puntersouthall.law
Two columns. One case file.
The division of labour is deliberately clean. We own the population and everything that happens to it. Punter Southall owns the analysis of what that population represents financially.
Neither column reaches into the other. The value is in the seam between them being designed rather than improvised.
Participation infrastructure
The claimant, end to end.
- Claimant acquisition and registration
- Eligibility validation and data quality
- One claimant record, maintained for the life of the case
- Engagement through the quiet years
- Programme reporting against the case timetable
Quantum & analytics
The numbers, end to end.
- Loss and damages modelling
- Claim sizing against the pleaded case
- Analysis of the claimant book as a financial asset
- Cohort and distribution modelling
- Analytical support for funder diligence
Fig. 01 — the join. Column A produces the population; column B values it. The case file is the only shared surface.
Two firms, one file, no overlap. That is the whole design.
Stage by stage
The analysis is not a phase at the end. It runs alongside the participation programme from case design onward, reading the book as it forms.
Stage 01 is the one most often skipped.
Sizing the claim before the book is built changes what the book needs to be. Doing it afterwards means living with whatever was collected.
Case design Participation strategy: who must be reached, and what a viable book looks like. Indicative claim sizing, so the book is designed against a number rather than a hope.
Book build Acquisition and registration, or activation of data the firm already holds. Definition of the fields the analysis will need, captured at intake rather than reconstructed later.
Validation Eligibility screening and cleansing, applied at intake and maintained. Review of what the validated set does to the claim — and what the rejections cost.
Book analysis The claimant record, reported weekly: composition, completeness, movement. Cohort analysis: which segments carry the value, and which are cost without weight.
Quantum Evidence gathering at claimant level, to the specification the analysis requires. Loss and damages modelling on the actual book, documented for counsel and funders.
Distribution A contactable, verified population ready to be paid. Allocation methodology built in advance, not drafted in the settlement window.
A book you cannot value is a book you cannot fund.
Documents, not introductions
A joint engagement that produces nothing but a warm handshake is not worth publishing. These are the artefacts the joint engagement is designed to put on your desk.
Every legal decision remains with instructed counsel. Every quantum opinion remains with the analysts who signed it.
The two firms are separately owned, separately regulated and separately instructed. Conflicts are checked independently on each side before a matter is accepted, and data-sharing terms are agreed in writing before anything moves between us.
Available across all three operating modes
The partner register sits above the operating modes, not inside one. Whichever configuration of the Participation Operating System™ a matter runs on, the analytical discipline attaches the same way.
It is optional in every case. No mode depends on it, and no mode is diminished without it.
CasePartners™
You hold the book. The analysis reads data you already have, from the first week rather than the last.
Read the mode →LeadPartners™
We build the book. Sizing the claim first tells us what the book has to contain to be worth building.
Read the mode →ArbPartners™
US mass arbitration. Per-claimant economics decide whether a campaign is viable at all.
Read the mode →- Jurisdiction
- UK (CAT, GLO) · EU (WAMCA, RAD). US matters are considered case by case.
- Best introduced
- At case design, before the participation programme is specified.
- Also useful
- Mid-programme, where a book has grown faster than the analysis behind it.
- Not a fit
- Matters where quantum is already instructed and settled. We will not duplicate an existing expert.
Questions of substance
Is Punter Southall instructed on our case?+
Not by us. The engagement is between Mediatasks and Punter Southall; instruction on your matter is yours to give, directly or through the programme, on terms you agree with them.
Does this replace our own quantum expert?+
No. Expert evidence remains a matter for counsel and for the expert instructed to give it. This is analytical capability available to the case, not a substitute for anyone already named.
When in the case should the analysis start?+
Case design. A sized claim changes what the claimant book needs to contain, which changes what the participation programme is built to collect. Introduced at settlement, the analysis can only describe what was collected.
What does Mediatasks see of the financial analysis?+
Only what the firm authorises. In practice we need the data specification — which fields must be captured, to what standard — not the conclusions drawn from them.
Can we run the participation programme without this?+
Yes. Every operating mode stands alone. The partner register adds disciplines to a case; it is not a dependency of the infrastructure.
How is the arrangement paid for?+
Each firm is paid for its own work, on terms agreed with you in writing before it begins. Neither firm pays the other for an introduction. The specification sets out the commercial basis in full.
Request the specification.
The joint specification sets out scope, the division of responsibility, data handling between the firms, conflict procedure and the commercial basis in full. Sent as a PDF, no call required.
Request the specification
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