Our approach to structural maintenance is based upon experience from across our contracts, notably in Hounslow and the Isle of Wight where, in total, we maintain over 3,000 structures including bridges, culverts, retaining walls and subways. We design our programmes to maintain assets in the most efficient way and, in the case of historic or listed structures, to maximise their preservation. This is particularly the case where we work in historical parts of the country such as Chester, maintaining and restoring listed structures.