CABERNET has defined brownfields as sites which (1) have been affected by former uses of the site or surrounding land; (2) are derelict or underused; (3) are mainly in fully or partly developed urban areas; (4) require intervention to bring them back to beneficial use; (5) and may have real or perceived contamination problems. TIMBRE is focussing on Megasites, which are understood to be a subcategory of brownfields.