A monitoring and recording exercise was undertaken by Colchester Archaeological Trust in December 2014 and January 2015 during ground reduction for the new building (a depth of 1m to the underslab formation level) and relocation of services (excavated to 650mm bgl).<1> The groundworks were largely within the post-Roman overburden - a post-Roman topsoil L1 to a depth of 750mm, continuing down into a Roman demolition layer L2 on top of in situ Roman floors. On the northern edge of the ground reduction area, however, engineering design required the removal of a greater depth of overburden than was intended. This exposed Roman demolition deposits overlying Roman floors, mainly tessellated pavement. There were also two robber trenches indicating the lines of robbed out Roman walls. In this northern part of the site the floor levels, once recorded, were removed to create the required formation level. In the southern edge of the site a second area of tessellated floor F10 was identified. These remains have been left in situ, and have been being covered by protective material to protect them during the construction of the new building. The floors and (robbed out) wall lines were probably part of the western side of the Roman building uncovered in 2005 (Building 211 in the numbered series of Colchester Buildings). <2> Although most of the finds came from the post-Roman soil layers removed during ground reduction and are not in Roman contests, the general range of finds is consistent with high-status building being close by - Purbeck marble veneer fragment, painted wall-plaster, tesserae made from a hypocaust box-tile. Both tessellated floors were cut by post-Roman features - F5-F7 in L4, F8 in F4, and F9, F11 and F12 in F10. There were no finds from these features. They are described as either small pits or post-holes of unknown purpose. A trial-trenched evaluation was undertaken in 2014 (CAT Report 784). <3>