The Practice has been responsible for the ecological impact assessment of highway schemes, including undertaking Phase and Phase 2 habitat surveys, and National Vegetation Classification assessments. The assessments have included recommendations for mitigation proposals, in conjunction with the landscape mitigation measures.

Anthony Stiff has also been responsible for the coordination of ecological issues into larger environmental studies, particularly highway and port projects. For the latter, issues have included terrestrial and marine aspects of ecology.

Recent commissions for ecological work have included:

• Shenley Common Farm, Milton Keynes ñ assessment of potential impact of new housing on Site of Special Scientific Interest for the Commission for New Towns
• Assessment of potential mixed development site for English Partnerships in Crawley, including site of Local Nature Conservation Interest.
• Stoke Hammond Bypass, Buckinghamshire
• A69 Haltwhistle Bypass
• Blue Circle, Northfleet Works, Kent

The practice has been responsible for the ecological monitoring of the A69 Haltwhistle Bypass in Northumberland. In particular the supervision and monitoring over three years of the success of translocated metallophyte turf.