This document reports on a process of archaeological monitoring conducted in May 2021 during groundworks associated with improved drainage at Haydon Old Church, Haydon Bridge. The mitigation was designed to satisfy a condition issued by the Diocesan Archaeological Committee; the groundworks were considered likely to disturb or damage archaeological remains surviving within the churchyard. No graves or cut archaeological features were disturbed during hand excavation at Haydon Old Church. The deposits encountered during groundworks consisted of topsoil and backfill of modern drainage features. No further archaeological monitoring is required during the groundworks associated with this scheme. It is concluded that no graves or cut archaeological features were disturbed during hand excavation at Haydon Old Church. The deposits encountered during groundworks consisted of topsoil and backfill of modern drainage features. The masonry fragments and human bones encountered in pits 1-3 show a large level of repeated disturbance in the churchyard. This is unsurprising given the various works carried out on the church buildings and historic burial practices resulting in the disturbance of earlier graves. The most significant discoveries were the probable footings of the 1795 buttress on the west wall of the church and the possible footing at the south-east corner of the chancel. The former structure is exactly where the 1795 buttress is projected to have stood, while what the latter structure represents is unclear. No further stonework was encountered in the area.