Evaluation by R and P Savage of SyAS led to the discovery of a short collapsed section of a post-medieval brick culvert running south-west from Cobham Lodge, probably built at the same time as Cobham Lodge in 1804. The collapse had occurred at a point where the culvert had been entered and altered during the early to mid-20th century, when two blocking walls had been inserted inside the culvert, one on each side of the section, which had now collapsed