Treweek Environmental Consultants (TEC) has capabilities ranging from strategic environmental assessment and wider sustainability appraisal to focused impact assessment and detailed ecological surveys.

We work with an established network of specialist consultants to provide integrated, comprehensive advice on a wide range of environmental and sustainability issues in the UK and overseas.

TEC already has a wide portfolio of clients including:

Underlying all of TEC's work is a strong commitment to sound environmental planning and sustainable development

Recent projects

Scoping study for the design and use of biodiversity offsets in an English context

The UK is committed to reduce current rates of loss of biodiversity by 2010 under the Convention on Biological Diversity (CBD), and has more challenging targets as an EU Member State, but available evidence suggests that decline in biodiversity is continuing to the point where essential ecosystem services may be compromised.


Offsets offer a potential new source of finance for biodiversity and a mechanism to integrate biodiversity into economic decision making. There is increasing interest in offsets as a mechanism for enhancing biodiversity in the wider countryside and for non designated sites and features.

DEFRA have commissioned a consortium including BBOP, TEC, Oxford Brookes University, Biodiversity by Design and the Scottish Agricultural College to examine and review existing experience on Biodiversity Offsetting. The next stage of the project will be the development of alternative options for implementation of a system of biodiversity offsets in England and Wales.