Report on Archaeological Watching Brief at Christ Church, Downend, South Gloucestershire, a grade II listed building, during works associated with the refurbishment and modernisation of the building. The project included replacement of all services, re-arrangement of kitchen and bathroom facilities, and opening of a blocked entrance on the south side of the Church. Unfortunately monitoring was not in place when the majority of the ground-works occurred. Eight burial vaults were uncovered during the removal of the floor within the nave; though most appeared empty, one was apparently full to capacity; just below the floor surface a sealed lead coffin was revealed. Two burial vaults at the west end of the church were directly below two supporting posts for the upper gallery, suggesting that they predate the gallery, which may have not been an original feature of the building when it was first constructed.The floor level of the chancel is approximately 1m higher than other areas of the church, which is worthy of note as the topography of the site is relatively flat. The chancel was added some 80 years after the initial structure had been built; perhaps there are further burial vaults below it. Research into the history of the church found that it was constructed as a Chapel of Ease in 1831 to ease pressure at the parish church, which was then St James, Mangotsfield. Plans and maps record the gradual extension to the church which occurred in three phases.