A single trench measuring 10.50m (NS) by 2.30m (EW) was machine excavated by Richard Ward contractors using a toothless bucket to 60.27m OD, 0.60m bgl at the southern end and 0.44m bgl at the northern end of the trench. An archaeologist was in attendance throughout these groundworks to record the stratigraphical sequence, and any archaeological remains within the trench. The watching brief was undertaken using Oxford Archaeologys general approach to excavation and recording as outlined in the WSI (OA 2020). Oxford Archaeology (OA) was commissioned by Original Field of Architecture on behalf of St Edmund Hall, Oxford to undertake an archaeological watching brief during the construction of a new disabled access ramp for the 17th century Grade I listed Old Dining Hall on the west side of Front Quad at St Edmund Hall, Queens Lane, Oxford. The site is centered on NGR SP 5185 0630. A single trench measuring 10.50m (NS) by 2.30m (EW) was machine excavated to between 0.45m and 0.60m below existing ground level (bgl) (60.27maOD) and was located adjacent to the eastern wall of the Old Dining Hall within the Front Quad. Archaeology was encountered from 0.14m below ground level, downwards to the limit of excavation (max. 0.65m bgl) at 60.27maOD; further archaeological deposits undoubtedly lie below this level. The earliest deposit encountered within the trench was an undated garden soil, a possible limestone surface and a garden soil dating from the late medieval to early postmedieval period. These deposits probably predate the construction of the existing college West Range and indicate survival of late medievalearly postmedieval archaeological sequences at the site. The limestone foundations for the Old Dining Hall were partially revealed. The joint between foundation and wall probably indicates the level of construction for the existing West Range, and although no construction cut was visible, this horizon appears to separate the pre mid17th century archaeological sequence (including late medieval deposits) from the post mid17th century deposits.