Thirteen 50m x 1.80m trenches were excavated This evaluation comprised 13 trenches targeting the access track to the WWII barrage balloon site to the north of the proposed development area (PDA), the likely continuation of Roman remains found to the north of the PDA, geophysical anomalies, apparently blank areas and disturbed areas within the geophysical survey and areas that had not been suitable for geophysical survey. Five trenches yielded information of archaeological interest. Significant archaeological remains were found within Trench A3 where a substantial Romano-British ditch was encountered, this almost certainly continued northwards into Trench A9. Trenches A6, A7 and A10 contained other undated ditches probably representing enclosures. Trenches A4 and A5 were sited on a former gas-fired power station and revealed a modern concrete slab that had truncated any putative archaeological remains. Trench A1 revealed evidence that this area had been stripped previously, probably as a construction compound for the former power station. The work demonstrates the presence of Romano-British archaeological remains at the site. These are not considered to be sufficiently important to warrant refusal of planning consent or changes to the proposed development to preserve the remains in situ.