Evaluation by trial trenching in advance of construction of the M25 service station, by Graham Hayman of SCAU for the Department of Transport, revealed concentrations of 13th century pottery associated with areas of burning, thought to indicate the production of Limpsfield ware; further excavation was recommended. Two sections, one either side of the M25, were also dug through the London-Lewes Roman road and variations in construction were noted. Two areas, one either side of the motorway, were subsequently excavated by Graham Hayman of SCAU for English Heritage. In the northern area large quantities of pottery and some stone were removed, but all that was left of the kiln itself was an intense patch of surface burning, because the kiln had been built up, rather than dug into natural. In the southern area large quantities of pottery, probably representing a waster dump, and much burnt material were removed. A small kiln dug into natural was found; it was unlined, with a flue at either end. Some postholes nearby, associated with tool fragments, probably represent the remains of a workshop. (271) Displays on the results of the excavation have been produced by SCAU for exhibition at the Clacket Lane Services. (see report in SyAC 84, 1-87)