Fieldwalking was carried out on circa 29ha of land as part of a programme of evaluation prior to industrial development. The fields were walked in 15m transects on a field-by-field basis. Field 1 was a ploughed surface with almost 100% visibility, apart from an area of patchy weeds and grass circa 125m by 75m towards the east side of the field and a small area of low stubble immediately to the south-west of this, which reduced visibility to circa 50%. Field 2 contained a crop of leafy brassicas which was dense in places but had a patchy distribution, resulting in numerous open areas with high visibility and other areas with moderate visibility. Field 3 had been ploughed but was obscured in places by the rotting remains of cabbage and Brussels sprout crops. In Field 4, the north-west part contained a patchy cover of low weeds and grass offering circa 50-75% visibility. This gave way to a 35m band of patchy vegetable crops, followed by a denser area of crops which could not be walked. Beyond this, the remainder of the field had a cover of low grass with less than 10% visibility.{1}