Archaeological monitoring was carried out by Colchester Archaeological Trust in April 2019 during exploratory excavations to locate existing electrical cables servicing an old electrical substation and further excavations to construct a new electrical cable conduit to connect a new electrical substation to the school building. Two features of possible Roman date – a ditch F13 and an irregular feature F15 – and three post-medieval features – a ditch F12, a pit F10 and a pit/ditch F8 – were exposed by the groundworks. Ditch F13, of possible Roman date, was aligned NNE-SSW, 1.44m wide x 0.39m deep. F15 extended beyond the limit of excavation; its exposed extent was 1.28m wide x 0.33m deep. There were four small worn sherds (6g) of Roman coarse, locally-produced grey ware pottery. These sherds came from the pit/ditch F8, ditch F13 and the ?irregular features F15.<1>