2.3 Who's Who: The Main Groups in the Insurance Market

Key Takeaways

  • The insurance market is best learned as five groups: buyers, intermediaries, insurers, reinsurers, and the specialist service providers and market organisations that support them
  • Buyers divide into personal (individual and household), commercial (sole traders to multinationals) and public-sector purchasers, and their size determines which distribution route they use
  • Intermediaries include brokers (who act for the client), tied agents and appointed representatives (who act for the insurer), managing general agents holding delegated underwriting authority, and aggregators
  • Insurers include proprietary companies, mutuals, captives, protection and indemnity clubs and Lloyd's syndicates, while reinsurers sit behind them and take no contractual relationship with the original insured
  • Loss adjusters act for the insurer and loss assessors act for the policyholder, which is the single most commonly confused pairing in the market map
Last updated: August 2026

Learning outcome 4 — the structure and main features of the insurance market — carries 14 questions, more than any outcome except regulation. It is also a know outcome, which means the CII can only test it by recall. That is good news: the marks are there for anyone who has memorised who does what, who acts for whom, and how a risk travels through the market. This section gives you the map; the sections that follow fill in Lloyd's, the London Market, reinsurance, the distribution channels and the market organisations in detail.

The Market as a Chain

An insurance market exists to move a risk from someone who does not want it to someone who is paid to carry it. Money travels one way and risk travels the other:

Buyer → Intermediary → Insurer → Reinsurer

with service providers and market organisations standing alongside every link. Learn the market as those five groups and almost every recall question on learning outcome 4 resolves itself.

Group 1 — Buyers

The buyer (proposer, and once the contract is made, the insured or policyholder) is whoever has an insurable interest to protect. Three broad populations:

  • Personal / retail buyers — individuals and households buying motor, home, travel, pet, private medical and life cover. High volume, low individual premium, largely standardised wordings, and heavily protected by conduct regulation because of the imbalance of knowledge between the parties.
  • Commercial buyers — sole traders and micro-businesses at one end, and multinationals with their own risk-management departments at the other. Large corporate buyers often employ a risk manager whose job is to decide what to retain, what to control and what to transfer, and to instruct the broker accordingly.
  • Public-sector and institutional buyers — local authorities, NHS bodies, universities and charities, usually buying through a broker and often through collective purchasing arrangements.

Buyer size drives everything downstream. A householder buys a packaged product online; a multinational's property programme is placed by a broker across a panel of insurers and reaches the London Market.

Group 2 — Intermediaries

Intermediaries stand between buyer and insurer. The examinable point is always who the intermediary acts for, because that determines whose knowledge is attributed to whom and who is liable when something goes wrong.

IntermediaryActs forKey features
Insurance brokerThe clientIndependent; advises on cover and selects from the market; owes the client a duty of care and, on advised sales, a duty of suitability
Tied agentThe insurerSells the products of one insurer (or a limited panel); cannot offer a whole-of-market view
Appointed representative (AR)The insurer or principal firmExempt from authorisation; the authorised principal is responsible and liable for the AR's regulated conduct
Managing general agent (MGA) / coverholderThe insurerHolds a delegated underwriting authority to bind risks on the insurer's behalf within agreed limits
Aggregator / price-comparison siteGenerally an introducerPresents quotes from a panel; regulated by the FCA for the activity it performs

A broker acting for the client but holding premium as agent of the insurer under risk transfer is a deliberate and frequently tested wrinkle. Where risk transfer applies under the Terms of Business Agreement (Section 4.6), the insured discharges the premium debt the moment the money reaches the broker, even if the broker never passes it on.

Group 3 — Insurers

The insurer (or, in life business, the assurer) is the party that accepts the risk and promises to pay. UK carriers take several legal forms:

  • Proprietary companies — shareholder-owned, profit-seeking; the majority of the UK company market.
  • Mutuals — owned by their policyholders, who share in any surplus; no external shareholders to satisfy.
  • Captives — insurance subsidiaries owned by a non-insurance parent to retain and finance the parent group's own risks (Section 3.1).
  • Protection and indemnity (P&I) clubs — mutual associations of shipowners providing marine liability cover to their members.
  • Lloyd's syndicates — groups of members underwriting through the Lloyd's market rather than as companies (Section 2.4).

Inside any insurer sit the functional roles the syllabus expects you to recognise: underwriting, claims, actuarial, investment, reinsurance, and compliance.

Group 4 — Reinsurers

Reinsurers insure insurers. They take no contractual relationship with the original policyholder: the direct insurer remains solely liable to its own insured, and the insured cannot sue the reinsurer. Reinsurers give the market its capacity to write large and catastrophe-exposed risks, and retrocessionaires perform the same service for reinsurers. Section 2.7 covers the purpose and the main forms.

Group 5 — Service Providers and Market Organisations

The final group carries no risk but makes the market work.

ParticipantActs forRole
Loss adjusterThe insurerIndependent professional appointed to investigate and negotiate a claim
Loss assessorThe policyholderEngaged and paid by the insured to prepare and present the claim
Risk surveyorThe insurerInspects and reports on physical hazard before or during the policy
ActuaryThe insurerPrices business, sets reserves and models capital
Trade bodies (ABI, BIBA, LIIBA, IUA, LMA)Their membersRepresent commercial interests; publish guidance; not regulators
Professional body (CII)The professionSets qualifications including IF1 and publishes the Code of Ethics

Loss adjuster versus loss assessor is the single most confused pair in the market map. The adjuster is instructed and paid by the insurer even though the role is exercised independently; the assessor is instructed and paid by the policyholder. The names are almost identical and the allegiances are opposite.

How a Risk Moves Through the Chain

A manufacturer wants £40 million of property and business interruption cover. Its risk manager decides to retain the first £250,000 of any loss. Its broker prepares a presentation and approaches the market. A lead insurer takes 40%, and further insurers subscribe the remainder as co-insurance (Section 3.1). Each insurer protects its own account with reinsurance. When a fire occurs, a loss adjuster is appointed by the insurers; the manufacturer may instruct its own loss assessor. Premium flows the other way — from the manufacturer, through the broker under risk transfer, to the insurers, and on to the reinsurers.

Every participant in that story belongs to one of the five groups, and knowing which one, and who they act for, is exactly what learning outcome 4 tests.

Test Your Knowledge

Following a serious fire at a factory, the insurer appoints an independent professional to investigate the cause, quantify the loss and negotiate settlement. The policyholder separately engages and pays its own professional to prepare and present the claim. What are the two roles?

A
B
C
D
Test Your Knowledge

A firm holds a written authority from an insurer allowing it to accept and bind risks on that insurer's behalf, within defined classes, limits and rating parameters, without referring each case back. Which market participant is this?

A
B
C
D