Report on a programme of geophysical survey conducted at several locations adjacent to the A1 to help inform the construction of proposed new road junctions. One site at Colsterworth and two at Gonerby Moor were surveyed, as was a fourth at Apleyhead in Nottinghamshire. At Colsterworth, several anomalies interpreted as former boundary ditches were encountered. A possible palaeochannel or hollow way was also noted. Nine discrete survey areas across two sites were investigated at Gonerby Moor. In the northern areas, ditched rectangular enclosures and associated features were encountered. The presence of ridge and furrow remains was noted across this site. A palaeochannel was also noted. In the southern site, rectilinear features possibly representing a Romano-British farmstead were encountered in the southwestern area. A group of less regular enclosures was encountered in the centre of the site, suggesting at least two distinct phases of occupation. More possible rectilinear enclosures and evidence of industrial activity was encountered at the northern survey area. Fragments of ridge and furrow were also recorded in several of the survey areas.