Colchester Archaeological Trust undertook a watching brief in February 2015 during the construction of an extension to the side and rear of 32 Thompson Avenue, Colchester. <1> A modern topsoil (L1) overlay a medium brown loam (L2) which, in turn, overlay the natural sand and gravel (L3). L1 contained modern slate and brick fragments (not retained). No finds or inclusions were observed in L2. In the west side of the foundation trenches natural sand and gravel (L3) was found to be approximately 100mm below ground level falling to 600mm below ground level at the eastern end of the foundation trench. This appears to have been the result of terracing when the estate was built in the early 1960s and suggests significant disturbance to any archaeological remains in the surrounding area. No archaeological features were recorded.