During groundwork to locate a leak in the moat bank, two small areas of excavation were undertaken. The moat bank was considered to comprise of two discrete deposits. The upper deposit was unstable and exibited downslope slumping, the lower deposits were homogenous and stable. Underlying strata was found to be of alluvial clay. No significant artefacts were recovered, and it was considered that the bank may well have shrunk in height since the last episode of constructional landscaping.