Watching brief by R Savage of SyAS during a stoppage on the Wey Navigation. Evidence for the construction of a partition or weir between the large mill pond and the Navigation was revealed. The brick and timber construction of the weir incorporated rectangular blocks of waste from copper processing and may date from Alexander Raby’s ownership of the site between c 1777 and 1807 when he maintained an iron and copper works here. Metalworking continued at the adjacent mill until 1831, so the construction of the weir could relate to later works.

Watching brief by H Knight of MOLA, forming part of the project ongoing at this site since 2002 (SyAC 90, 91, 94 and 95), examined the western foreshore remodelling near, but not directly adjacent to, the south of Chertsey Bridge. Truncated deposits of 16th–19th century date were noted, but no evidence was revealed of the medieval Chertsey Bridge structure – presumed to have been located very close to the north of the site. No significant finds or features of earlier date were apparent.

Two phase evaluation by T Munnery of SCAU, prior to the construction of a new building at the Upper School and extension to the existing Coach House. A single pit of probable 13th century date was discovered at the Coach House site. Two late medieval or early post-medieval pits were revealed at the Upper School site, with indications of earlier activity in the immediate vicinity being noted within the finds assemblage. The Coach House development was calculated not to damage archaeological horizons, so no further work was recommended.

Watching brief by S Porteus of ASE during groundworks associated with the construction of a new extension to the north of the building. Four brick tombs of late 18th–19th century date were identified and recorded. A total of seventeen burials were excavated during the course of the work, and these were to be reburied elsewhere in the graveyard. A further nine were revealed but were preserved in situ as they were below the level affected by the extension groundworks. The burials all appear to be post-medieval in date.

A programme of investigation comprising historic building recording and excavation of inhumations by S Watson of PCA, was undertaken after partial demolition of the current vestry, and the subsequent ground reduction of the site prior to the construction of a new enlarged vestry and during associated drainage works. After the demolition of the vestry (presumed to have been constructed in 1823 with later alterations), the lower part of the northern exterior wall of the chancel was exposed.

Historic building record and watching brief by N Shaikhley of SCAU prior to and during the creation of new visitor facilities. A number of features associated with the development of the Polesden Lacey estate were exposed during the watching brief, notably a brick-built domed structure that probably served as a storage tank for a water trough and hand-pump formerly in this location as illustrated on a 1905 photograph

Watching brief by S Watson of PCA during geotechnical test pitting revealed a single feature, a brick-built drain of probable late 19th century date.

Building recording by V Boesso of MOLA prior to the reconstruction of a listed wall. The structure was noted to have been extensively rebuilt in the 19th century, but the oldest elements appeared contemporary with the nearby Guildford House, which dates to 1660. A subsequent watching brief by S Hoad of MOLA, carried out during the dismantling of the wall, revealed a well situated partially beneath the foundations that obviously pre-dated its construction.

Historic buildings survey by G Potter of CA prior to demolition recorded a number of 19th century features.

Evaluation by S Holden of PCA revealed evidence of prehistoric activity in the form of residual finds, a probable gully of early Roman date, and post-medieval remains including an element of an 18th century structure and 19th century landscaping. The evaluation illustrated that archaeological remains lie at a depth that will not be impacted upon by most of the groundworks involved in the development proposed for the site, and they will be preserved in situ beneath it.