Geophysical survey in 2011 and 2012 found evidence of a number of linear and rectilinear anomalies.
From the report :

"In Field 2, eight grids were surveyed with magnetometry to investigate the rectilinear enclosure and ‘trackway’ visible in aerial photographs. This area is on the steeply-sloping side of the valley. Three sides of an enclosure are represented by positive linear anomalies [39], within which are a scattering of small positive and dipolar anomalies as well as a wide positive linear anomaly [43] parallel to the eastern side of the enclosure. Positive linear anomaly [41] runs parallel to and south of [39]. Positive linear anomaly [40], aligned appromately to the enclosure [39] to its north, could represent the corner of an earlier phase of the enclosure. Perpendicular positive linear anomalies [42] and [44] appear
to cut through this complex; they are, however, the only features aligned to the Roman road, c. 100 m to the northeast"(1, 2, 3)

<1> CUCAP BXK 78-81 (16-06-76) (OS Card Reference). SKE39511.

<2> Lacey Wallace, Paul Johnson and Kristian Strutt, 2013, Bourne Park (Bishopsbourne) Geophysical Survey: 2012 Results (Unpublished document). SKE18147.

<3> Lacey Wallace, Paul Johnson and Kristian Strutt, 2014, Bourne Park (Bishopsbourne) Geophysical Survey 2013 Results (Unpublished document). SKE31257.