Pre-Construct Archaeology (PCA) is one of the largest heritage practices in the UK with the capability to undertake projects of all sizes and complexity and in any geographic location. Started in 1993, PCA operates from offices in London, Cambridge, Market Harborough, Winchester and Durham. Offering a broad range of archaeological services, PCA is proud to have achieved the criteria enabling it to become a Registered Organisation (RO) at the Institute for Archaeologists. Being an RO means that we are committed to maintaining professional and ethical standards and that our clients can commission work with confidence. PCA is also registered as ISO 9001:2008 and is CHAS compliant.