A watching brief was undertaken during all intrusive groundworks with the potential to disturb archaeological remains. The specific works comprised two areas: i. An area of excavation for the construction of the kitchen extension, and ii. trench excavation for a new gas supply to the kitchen and main house. The watching brief areas were machined excavated using a toothless ditching bucket with an archaeologist in attendance. All archaeological remains encountered were investigated and recorded in accordance with the standard OA guidance detailed in the Written Scheme of Investigation (WSI; OA 2021b). Ground was reduced to the construction formation level of between 0.71.2m below current ground level (bgl; see Appendix A). The route of the gas pipe trenching differed slightly from that illustrated in the WSI (OA 2021b) due to vehicular access considerations. Figure 1 shows the course of the gas pipe trench as it was excavated. Oxford Archaeology was commissioned by Savills on behalf of James Perkins to undertake an archaeological watching brief for a kitchen extension and gas service connection at Aynhoe Park House, Aynho, Northamptonshire. The watching brief was undertaken between March and May 2021. The watching brief recorded a stone surface extending beneath the current driveway and former stable yard. The surface is probably associated with Soanes remodeling works in the early-19th century and repositioning of the main entrance. Drainage related to a later post-medieval water collection system were observed beneath this surface. Other earlier features include a possible wall, a pit feature, and a probable trampled surface which are considered likely to relate to later post-medieval activity. Evidence of 18th century garden soils was recorded within the northern part of the site. Apart from a small assemblage of finds retrieved from later deposits, no evidence of the 17th century house or associated features was observed during monitoring works