Walnut Tree Station, Higham Ferrers, Northants.

An archaeological watching brief was undertaken by Oxford Archaeological Unit duing a geotechnical survey of the former Walnut Tree petrol service station by Thorburn Colquhoun (consulting engineers),for the Duchy of Lancaster on 13th-14th January 1997. A total of eleven geotechnical trial pits were excavated under archaeological observation and recorded prior to backfilling. Definite archaeologcial remains, comprising of a thick medieval soil deposit and a limestone wall, were recorded in one trial pit with potential demolitions debris from two others.