Oxford Archaeology (OA) North were commissioned by Forterra Building Products Ltd to undertake a watching brief over land at Claughton Moor Quarry, Lancashire (centred SD 579649) which they propose to quarry to extract brick shales. The work forms a continuation of the assessment of the archaeological potential at Claughton Quarry, with previous phases including a desk-based assessment (undertaken by Oxford Archaeological Associates Ltd (OAA) (2001b), walkover surveys and watching briefs (OA North 2003 and 2015). Hanson Building Products (UK) Ltd were granted planning permission on February 14th 2000 (Application Ref 1/98/29), and the planning permission subsequently passed to Forterra Building Products Ltd. No features or finds of archaeological significance were noted within the area of ground disturbance during this and previous phases of fieldwork. Consequently, the site as a whole seems to be generally of low archaeological potential, reflecting its use over time for mainly pastoral activities.