The watching brief involved the monitoring of ground reduction associated with a new basement by mechanical excavator. Natural Kempton Park Gravels were recorded between 3.60m and 3.75m OD and were uniformly overlain by modern made ground; the natural deposits appeared to have undergone significant horizontal truncation. The watching brief found a single feature comprising a probable drainage trench of 19th or 20th century date; this feature had probably survived due to its significant size and depth and had been heavily disturbed by the groundworks.