Historic building recording by S Underdown of OAS. The oldest part of the property contained evidence for the remains of two bays of a medieval open hall house of probable late 14th to early 15th century date. A two-bay extension was dendrochronologically dated to 1580–97, with further extensions noted, dating to around 1700 and then continuing through the 18th–20th centuries. The property had been unoccupied for some time, and considerable damage to the historic fabric of the structure was noted, through a combination of vandalism, arson and neglect.

Landscape study by H Beamish of OAN, undertaken in 2009, and reported in 2010. Desk and topographical survey identified a wide range of features, many of which could be linked to the early use of the area as farmland prior to the creation of the park in the 19th century. These included ponds, quarries, boundaries and enclosures, a number of which were chosen for more detailed measured survey. Resistivity and magnetometry survey by M and A Roseveare of ArchaeoPhysica was also undertaken in an attempt to locate the remains of a Tudor property known from historic records.

Evaluation by the Oxford Archaeological Unit for Chris Blandford Associates along the line of proposed link roads beside the M25. Nine sites were tested by a combination of trial pitting and test pitting: Thorpe Fields; land west of Thorpe by-pass; land between Longside Lake and Great Fosters; land north of Wickham Lane; the Unigate Dairies, Egham; land west of Queensmead Lake; Yeoveney Lodge; Cambridge Kennels; and Poyle Meadows. Of these sites, four contained positive archaeological evidence.

A watching brief by OAU on trial pits excavated by the Environment Agency on the site of a proposed new wetland habitat, revealed silts and clays over natural gravel. These silts and clays, which presumably represent inundation’s by the river, were sealed by modern dredgings. A subsequent watching brief by OAU on the excavation of trial pits on the site of a proposed fish spawning channel, also for the Environment Agency, revealed a similar sequence of deposits.

Evaluation by B Matthews of OAU, for Care UK Community Partnership, of a redevelopment site on the edge of the town centre. A probable garden soil, containing 19th century pottery, sealed the natural. The only earlier evidence were two areas of disturbance in the natural, interpreted as tree root holes, one of which contained a sherd of probably 16th century Border Ware.

Evaluation by S Foreman of OAU, for of Dunthorne Parker Architects, in advance of the construction of an office building. A single ditch of recent date was revealed, which also contained a residual prehistoric struck flint.

Evaluation by S Foreman of OAU, for Nathaniel Lichfield & Partners, on land to be redeveloped as offices. A large degree of truncation was noted across the site, probably related to the construction of the brewery buildings formerly on this site. A single pit containing 12th century pottery was revealed at a low level.

Watching brief by R Bashford of OAU in advance of residential redevelopment revealed that any archaeology on the site had been destroyed by the construction of the Jolly Waggoners.

Geophysical survey of a pipeline route by E Mercer of Stratascan. A number of linear and discrete anomalies were identified by a detailed magnetometer survey. Additional fieldwork to clarify the presence and nature of any remains is scheduled for 2003. Field reconnaissance of the route by M Dover of SCAU identified a few additional earthwork features, none of which appeared to be under significant threat from the proposed pipeline.

Evaluation by A Holmes of OA in an area proposed for the construction of sports pitches. Possible prehistoric hearth pits and a ditch, together with a Medieval boundary ditch probably associated with the Royal Deer Park, and evidence for a Post-Medieval trackway were encountered, although the general density of features was low. No evidence for a postulated Roman road running through the site was seen, although a band of natural gravel was seen in the approximate location, which likely accounts for previously recorded geophysical anomalies across the area.