An archaeological evaluation was undertaken on land at Sunny Nook Farm, Blythe Road, Harworth, Nottinghamshire. A total of 130 trenches were excavated, including 127no. measuring 50m long by 2m wide and 3no. L-shaped trenches, with each arm measuring 50m long by 2m wide. Despite the location of the Site within an extensive late prehistoric and Romano-British agricultural landscape, including cropmarks indicative of a former ‘brickwork’ field system within part of the Site, only very limited archaeological evidence was encountered. In the south-west corner of the Site the undated remains of a square enclosure were encountered, matching a geophysical anomaly. On morphological grounds a later prehistoric or Roman date is conjectured for the feature. In the east part of the site fragmentary, very poorly preserved shallow ditches or gullies were identified in an area where field boundary ditches of likely Romano-British date have previously been identified from aerial photographs. Linear features were also identified in this area by the geophysical survey, although the evaluation demonstrated that most, if not all, of these features were the result of modern agricultural operations, comprising wheel ruts and plough scars. Near the northern edge of the Site a series of small ditches were also encountered; these features contained no finds and did not match any geophysical anomalies. Although these features did not produce any finds, their alignments notably differed from those of the post-medieval and modern field boundaries. Two large, slightly irregular features encountered in two trenches were interpreted as likely quarry pits of possible post-medieval date. An area of modern disturbance was also encountered in one of the two trenches.