LAST REVIEWED: JUNE 2026
Diamond car insurance scores 60/100 on the KT Score. Diamond is a trading brand of Admiral Group Plc, underwritten by EUI Limited (FRN 310848). Like Bell, Diamond was historically positioned as a female driver specialist. Since the prohibition on gender-based insurance pricing in December 2012, Diamond operates as a general car insurance brand. Diamond, Bell, Admiral and Elephant all share EUI Limited as their underwriter. Diamond may produce different price quotes from Admiral and Bell for the same risk profile due to different pricing models within the same group. The key consumer implication is that finding Diamond cheaper than Admiral on a comparison site is a genuine pricing difference worth acting on, not an error.
Diamond and Bell: what is the difference
Diamond and Bell are both trading names within Admiral Group that were historically positioned as female driver specialists. Both are underwritten by EUI Limited (FRN 310848). The practical difference between Diamond and Bell today is primarily in their pricing algorithms, brand identity and comparison site distribution strategies rather than in their product terms or underwriting.
Admiral Group operates Diamond and Bell as separate brands to maximise the number of price points it can present across the comparison site market. A risk profile that produces a mid-table result for Admiral may produce a top-three result for Diamond or Bell, increasing the likelihood that an Admiral Group product wins the consumer's business. This multi-brand comparison site strategy is legal and common among large insurance groups; consumers should be aware of it rather than assuming Diamond and Bell are genuinely competing independent alternatives.
Product terms for Diamond comprehensive cover follow the same tier structure as Admiral. The same Defaqto ratings apply to Diamond's policy tiers as to the equivalent Admiral tiers, as the product is underwritten by the same entity under the same policy wording. Diamond Gold and Platinum carry five-star Defaqto ratings. Diamond Essential carries two stars and should be avoided for the same reasons as Admiral Essential.
Diamond pricing and comparison site strategy
Diamond's pricing algorithm is calibrated independently from Admiral's despite sharing the same underwriter. This means Diamond may be priced above or below Admiral for any given risk profile. Running a comparison site search that returns both Diamond and Admiral quotes allows a consumer to identify which Admiral Group brand is offering the lowest price for their specific circumstances.
Diamond's distribution through comparison sites is selective. Not all UK comparison sites carry Diamond quotes. MoneySuperMarket, Compare the Market, GoCompare and Confused.com each have their own agreements with insurance brands regarding which trading names appear on their platforms. Where Diamond does not appear on a specific site, it does not mean Diamond is not available; a direct quote from diamond.co.uk may produce a different price from the Admiral quotes on comparison sites.
The most thorough approach for a consumer seeking the lowest Admiral Group price is to run comparison site searches on all four major sites, collect all Admiral Group brand quotes (Admiral, Bell, Diamond, Elephant) that appear, and compare the cheapest of those against genuinely independent insurers such as Aviva, Direct Line and LV.
Claims and FOS access for Diamond policyholders
Diamond claims are processed through Admiral Group's central claims infrastructure, which is the same operation serving all EUI Limited motor brands. The claims telephone number, the approved repair network, the total loss valuation process and the courtesy car provision are shared across Diamond, Bell, Admiral and Elephant. Policyholders of Diamond have identical claims service infrastructure to Admiral policyholders.
The August 2025 total loss settlement announced by Admiral Group, covering approximately 3% of write-off claims between 2019 and 2024 where vehicles may have been undervalued, applies to Diamond policies as part of the EUI Limited motor insurance portfolio. Diamond customers who believe their total loss settlement in that period may have been insufficient should contact Admiral Group's dedicated remediation team or raise a formal complaint.
Diamond vs Admiral vs Bell comparison
| Feature | Admiral | Bell | Diamond |
|---|---|---|---|
| Underwriter | EUI Limited | EUI Limited | EUI Limited |
| FCA FRN | 310848 | 310848 | 310848 |
| All major comparison sites | Yes | Some | Some |
| Gold/Platinum Defaqto | 5 star | 5 star | 5 star |
| Essential Defaqto | 2 star | 2 star | 2 star |
| KT Score | 63 | 60 | 60 |
Disclaimer: This review is produced by Kael Tripton Ltd for informational purposes only. It does not constitute financial advice. Kael Tripton Ltd is not FCA authorised. Company No. 17177071, ICO ZC135439.
Frequently asked questions
Is Diamond car insurance only for women?
No. Diamond was historically positioned as a female driver specialist but gender-based pricing in insurance was prohibited in the UK from December 2012 following the Test-Achats ruling (ECJ Case C-236/09) and its implementation under the Equality Act 2010. Diamond is now available to all drivers on equal terms. Gender is not a permissible rating factor for motor insurance pricing in the UK. Male drivers can and should compare Diamond quotes alongside other providers.
Who owns Diamond car insurance?
Diamond is owned by Admiral Group Plc and operated as a trading brand of EUI Limited (FRN 310848). Admiral Group Plc is listed on the London Stock Exchange and is a constituent of the FTSE 100 index. Diamond is not a separately incorporated legal entity; it is a brand name used by EUI Limited for motor insurance distribution.
Is Diamond cheaper than Admiral?
Diamond and Admiral use different pricing algorithms despite sharing the same underwriter. For some risk profiles Diamond will quote cheaper than Admiral; for others Admiral will be cheaper. The only way to establish which is cheaper for a specific consumer is to obtain quotes from both. Both quotes are backed by the same EUI Limited entity so the choice between them is purely one of price for equivalent cover.
How do I make a claim on my Diamond policy?
Diamond claims are made by calling the claims number on the Diamond policy schedule or through the Admiral Group claims portal online. The claims infrastructure is shared across all EUI Limited motor brands. Diamond's claims team uses the same approved repair network, total loss valuation process and courtesy car provision as Admiral. Response times and processes are equivalent to Admiral for claims of equivalent complexity.
