Dunstan Thomas

About Us

To work with every provider in the market by making the complex understandable with exceptional user experiences.

Dunstan Thomas provides business services and technology solutions for the financial services market, the wholesale energy market, as well as technology consulting and software development services across other markets.

Dunstan Thomas

Dunstan Thomas Group Limited is the parent company to the group's subsidiaries.

Dunstan Thomas Holdings Limited provides calculation engine and administration solutions to the financial services market with Imago Administration, Imago Illustrations, Imago Tools, Imago Automation and Imago Portal. The Imago family of products have been designed to meet the unique needs of product providers and platforms for the pensions and savings market.

Dunstan Thomas Consulting Limited and Surya Solutions Limited provides technology consulting, training, software development and support services across business sectors.

Dunstan Thomas Energy Limited provides solutions for the wholesale energy market. Genstar4 (eTerraTrade) is a dispatch solution for the electricity generation and supply industry in the UK and Europe.

For information on how we manage our business partner’s personal data, please refer to GDPR Customer Statement and GDPR Suppliers Statement.


Dunstan Thomas was founded in 1986 to provide software development and consulting resources. Early clients included IBM, Lotus and Racal. In the late 1980's the company delivered database consulting and training services and became a principal partner of Borland delivering professional services across a broad spectrum of technologies. Clients of these services included Exxon, BP and Barclays Bank.

By the mid 1990's Dunstan Thomas established a relationship with Microsoft and in 2004, became a Microsoft Gold Certified Partner delivering solutions with Microsoft technology. During the mid 1990's the company entered the pensions and investments market by providing services for James Hay and then later for Capita SIP Services. Over this period Dunstan Thomas has provided solutions and services for Aviva, Standard Life, Zurich Financial Services, National Australia Bank, HSBC, Barclays, RBS, and Clerical Medical.

Through Dunstan Thomas Holdings and Digtial Keystone, Imago and Integro CX clients include; AJ Bell, AEGON, Alliance Trust, Ascentric, Berkeley Burke, Careys, Courtiers, Fidelity, Friends Life, Hargreave Hale, Mattioli Woods, Multrees, Novia, Partnership, Pershing, Rowanmoor Group plc, SimplyBiz, Suffolk Life, Wealth at Work, Xafinity and Zurich.

Through Dunstan Thomas Energy, Genstar4 powers over 28% if the UK electricity generation market with clients including Drax, SSE and Severn Power.

Dunstan Thomas Consulting and Surya Solutions provides services to a wide range of clients from John Lewis to Vodafone, from Network Rail to the NHS.

Dunstan Thomas powers the technology and is a shareholder in Spire Financial Limited, a company that supports financial advice on platforms through technology.

Dunstan Thomas through the years...


Company founded in Waterlooville.

Enterprise Centre, Portsmouth



Old Treasurey, Southsea & Orchard Rd, Singapore

Enterprise House, Portsmouth



Enterprise House, Portsmouth

Enterprise House, Portsmouth



Enterprise House, Portsmouth & Shoreditch High St, London

Enterprise House, Portsmouth



Gunwharf Quays, Portsmouth

Gunwharf Quays, Portsmouth



Gunwharf Quays, Portsmouth

Gunwharf Quays, Portsmouth



Gunwharf Quays, Portsmouth

Gunwharf Quays, Portsmouth



Gunwharf Quays, Portsmouth

Gunwharf Quays, Portsmouth


Company Structure

Dunstan Thomas is the trading name for a group of companies.
The companies are:

  • Dunstan Thomas Group Limited (company number 8160246)
  • Digital Keystone Limited (company number 6245391)
  • Dunstan Thomas Holdings Limited (company number 03957367)
  • Dunstan Thomas Consulting Limited (company number 8162530)
  • Dunstan Thomas Energy Limited (company number 8163038)
  • Surya Solutions Limited (company number 6206371)

All the companies are registered in England and Wales under the Companies Act of 2006 as private companies.

T: 023 9282 2254