The aim of the archaeological evaluation was to record the extent of any surviving archaeological deposits and to assess the archaeological potential of the site to allow the ECCHEA to determine if further investigation is required. On 29th May 2019, a CAT archaeologist observed the reduction of an area measuring 31.4m� to accommodate the new swimming pool. An archaeologist monitored the groundworks until they reached the natural geological horizon, some 0.3-0.4m below current ground level (bcgl). The final formation level was 1.2-1.8m bcgl. Archaeological monitoring was carried out at Blue House Barn, Sudbury Road, Downham, Essex during the construction of a swimming pool. In spite of being located in an archaeologically-sensitive area, no significant archaeological deposits or material were encountered.