Magnetometer survey with a cart-mounted array of Bartington Grad-01- 1000L fluxgate gradiometers. The survey detected a pair of D-shaped enclosures and a complex set of other enclosures and pits flanking a Y-shaped trackway in the south of the pipeline route. It also detected an isolated enclosure in the north. Further magnetic responses revealed a pond and field boundaries, as well as field drains and buried utilities. One unusual set of responses across the southern fields may be due to bonfires from the clearing of modern orchards.
Manktelow et al. (Mon,) studied this question.