An archaeological evaluation was undertaken on land adjacent to the car park at the Seven Sisters Country Park, in advance of the proposed construction of a 32m x 8m reed-bed toilet waste disposal system. Two trenches were excavated with a cumulative length of 15m. Colluvial deposits between 800mm and 1200mm deep were recorded in both trenches, and found to contain significant levels of worked prehistoric flint, predominantly dating to the Bronze Age. No cut features were identified within the upper levels of colluvium, however in Trench A, a possible lynchet deposit and ditch were revealed from c.860mm below the ground surface, which corresponded to the alignment of a shallow upstanding topographic anomaly. The lynchet and ditch both survived below the proposed formation depth of the development. Nonetheless, a watching brief was recommended both to monitor for archaeological features within the colluvium, and to obtain a controlled sample of cultural material from within it. Subsequent to the evaluation, a watching brief was undertaken during the initial excavation of the reed bed, during which a sample of the colluvium was sieved to enhance the retrieval of cultural artefacts. This revealed the remains of a 17th to 18th century wall, and some small cut features which are likely to be relatively recent in date. The artefacts recovered during the work suggest that there has been activity in the area from at least the Mesolithic period, and large quantities of artefacts have accumulated against the lynchet from the Bronze Age through to the medieval period, suggesting that there was activity further upslope throughout these periods.