The geotechnical ground investigation comprised excavation of trial pits and cable percussion boreholes. A summary of interventions is given in Table 1 and the layout is illustrated in Figures 1 and 2. Three trial pits and one borehole at Greenwich originally designated for monitoring were descoped from the geotechnical works (BH-G-09, TPG- 01 and TP-G-02). An additional borehole was recorded at Silvertown (BH-S-19) during standing time. The drilling of the cable percussion boreholes was initially intended to be monitored directly onsite. However, the fieldwork in March 2020 coincided with the implementation of COVID 19 Health and Safety restrictions. After an initial cessation, work resumed under a revised safe system of work. Consequently, the majority of the boreholes were recorded from bulk samples collected at the geotechnical contractor's store. No intact core samples were available for examination. U100 cores were generally sealed and sent offsite immediately for lab testing. The excavation of all trial pits was, however, monitored onsite. Bulk samples from deposits with the potential for heavy contamination (eg asbestos, hydrocarbons) as indicated from the drilling logs, particularly made ground deposits and the very upper levels of the alluvium, were stored separately, and were not examined by the attending geoarchaeologist. A small number of sub-samples were recovered on an opportunistic basis from peat deposits, but the broad nature of the bulk sample recovery and potential mixing of deposits from different levels limits their usefulness for detailed palaeoenvironmental or dating work. The sediment was logged on standard proforma sheets in accordance with Jones et al. (1999) and Historic England guidelines for geoarchaeology (2015). The logs include a description of colour, compaction, texture, sorting structure and inclusions. It was not possible to log the contact between sediment due to the disaggregated nature of the samples. These descriptions were integrated with the geotechnical logs allowing quality assurance of the descriptions and interpretations. The data was then entered into borehole modelling software (Rockworks17) for the correlation of stratigraphic units and production of cross-sections. The interpreted digital stratigraphic data from the original deposit model (Quest 2015) was unavailable at the time of writing. Taking into account the relatively small number of interventions covered by the watching brief, it was not conside...