Cropmarks: ring ditches and linear feature (?modern).

Cropmarks - ring ditches.

Cropmarks: linear features and a very faint possible ring ditch.

Ring ditch.

Layer-de-la-Haye Treatment Works, Colchester, Essex

Duel concentric ring ditch recorded as a cropmark by air photography.

Cropmark of a ring ditch, recorded by air photography.

Cropmarks of various linear features, some of which form a rectilinear enclosure (with internal divisions).

Middle-Late Bronze Age pits and possible ring-ditch.

Linear cropmarks including double-ditched curving trackway; 2 (?) ring ditches showing very faint `pits'.