Follow the Thomson story so far…

Our interactive timeline shows our journey from the beginning, as we grow and grow, highlighting key successes along the way. You will also find pull outs of information, detailing the successes.

Leading experts in environmental compliance
Thomson Ecology Logo

Established in Guildford in 2004



Directors Icon

Two Directors, Nancy Thomson and John Mundy were joined by Richard Arnold as Technical Director.

Undertook first project at Rochester riverside, for Halcrow

Delivering the ecology chapter for an Environmental Statement. Unicomarine undertook the marine chapter for this project.

Awarded great crested newt survey contract

Conducted great crested newt surveys in 78 ponds along the Cambridge Guided Busway - the longest busway in the world.

Enterprise Resource Programme developed

Known as CID (Client Information Database).



Office Building

Expansion of offices

At Surrey Technology Centre, Guildford.



Office Building

Growing rapidly

Further expansion of offices at Surrey Technology Centre, Guildford.

Thomson Ecology iPad

First Thomson Ecology Handbook published

Available for download, this is updated every 1-3 years.



5 More

Further office expansion

Additional 5 office units at Surrey Technology Centre, Guildford.

Thomson habitats logo

Thomson habitats founded

Started work at the London Gateway site.

Leeds office opens

London Gateway Port win

Conducting, at the time, the largest ecological surveying and mitigation project ever undertaken in Europe.

M4 corridor Newport win

Environmental assessment expertise for the Welsh Government's £750m project.



Thomson Unicomarine

Purchase and integration of Unicomarine

To enhance our marine and laboratory capability.

Diversification into Arboriculture

In response to growing client requirements.




Moved from Surrey Technology Centre to larger premises

Due to company expansion and further growth forecast we move to Compass House, Guildford.

Mobile mapping devices

First used by our survey team in the field, allowing greater efficiency and accuracy in reporting.

Cardiff office opens



John Mundy

A founding director of the company, sadly dies of Leukaemia.



Welborne Garden Village residential development

Ecological baseline surveys and ecology chapter for the Environmental Statement.



States of Jersey Government Department of the Environment project win

Providing a policy for protected areas across the islands.

South Wales Valley lines electrification project win

Providing advice and innovative solutions on ecology constraints related to the proposed project.


Reptile and water vole translocation win

Large-scale translocation of water voles and reptiles for RSPB Wallasea Island, Europe's largest nature reserve.

High Speed 2 (HS2) Railway

Ecological survey work on phase one of the proposed HS2 route commissioned.



Directors Icon

The Marine Taxonomy Laboratory moves from Letchworth to Guildford

Completing the integration of Unicomarine to extend the laboratory capability.

Front of Train

Awarded Framework Contract for Network Rail

Becoming one of three preferred ecology advisory suppliers in England and Wales.

Railway Jackets

East West Rail project survey win

To undertake multi species surveys, phase one habitat assessments and 20 hectares of vegetation clearance along a disused rail route.




Network Rail Great Western route modernisation

Providing ecological support including survey work, consultancy and mitigation.

Thomson Interactive Mapping app

Winner at Construction News Awards.


Dudgeon onshore cable route win

To undertake surveys and mitigation work for multiple protected species, across a 48km cable route.



Water Team

Thomson’s Water team expanded

To cater for growing client requirements in areas such as freshwater, aquatic pollution and water quality assessment.


Unmanned Aerial Vehicle services launched

To provide greater access to sites, allowing increased visibility, flexibility and efficient data collection for clients.




HS2 enabling work begins

Mitigation package for phase one central section, C2a, of the landmark project.

Hornsea Three Wind Farm Onshore Cable Route

Undertook the ecology surveying and reporting for the 60km cable route to inform Environmental Statement.

Birmingham office opens

To support HS2 project.


Growth continues with team of 150 specialists

Thomson’s ecology handbook

This online version of the Thomson’s ecology handbook provides a general overview of current wildlife legislation* and is aimed at helping project managers understand and plan for ecology from the start.

Find out more

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