Watching brief by J Stevenson of SCAU carried out during office redevelopment revealed that the site had been subject to extensive disturbance by previous development, which would have destroyed any archaeology present.

Evaluation by M Bagwell of PCA prior to residential development revealed extensive previous ground disturbance and only one feature in the ten trenches excavated. This was a ditch, which produced six pieces of burnt flint, and has been interpreted as a possible prehistoric field boundary.

Evaluation by N Shaikhley of SCAU did not reveal any archaeological finds or features. The presence of a subsoil in part of only one trench indicates that extensive levelling had occurred over the site during previous development. The site, however, is unlikely to have been suitable for past settlement as alluvial deposits revealed in the trenches suggest the site had been prone to repeated phases of flooding.

Excavation by C Challis and S Coles of TVAS following an evaluation of the site in 2000. The excavations took place on the west bank of the river Wraysbury in an area thought to have been an island in times of flood, and exposed features comprising pits, postholes, ditches and a possible enclosed area. Features can be provisionally dated to the early medieval period (11th--12th century), but pottery of Roman and early to middle Saxon date was also recovered.

Continuing excavation by R Poulton of SCAU revealed further evidence of Roman activity.

Watching brief by P Jones of SCAU during building extension work revealed late 19th and 20th century rubble over post-medieval garden soils and river clay.

Excavation by P Jones of SCAU revealed near shore deposits, incorporating some Roman artefacts, but otherwise no significant archaeological deposits.

Watching brief by P Jones of SCAU following an evaluation last year revealed that the site appears to have been on the shoreline of a river channel that would once have lain largely below Bridge Street and possibly the neighbouring Montpelier House. Finds indicate that the site was probably not reclaimed until the 17th or 18th centuries, and the only archaeological features revealed were the truncated remains of some of the walls of the (probably late 18th or early 19th century) Lancasterian School that once stood on the site, and four cess and/or well pits.

Excavation by P Jones of SCAU and C Green of Archaeoscape of a series of test pits before and after the standing buildings had been demolished, confirmed that the site was prone to flooding and would not have been dry enough for permanent occupation until reclamation of the land at a relatively recent date.

An initial evaluation by G Potter of CA revealed archaeology of medieval and post-medieval date. A subsequent watching brief identified similar finds and features from these periods, including the ground plan of a small post-medieval cottage. Although at present only provisional dates are available, several features appear to relate to the Roman period including a significant length of ditch. A single inhumation in a square burial pit was also excavated. The skeleton has been dated to the Iron Age, and belongs to a female in her late 40s.