Product category - Any - Product - Any - Asset Language - Any - Company/Plant - Any - Your search yielded no results. UKCA Marking and Declaration of Performance Certificate search Locate your Declaration of Performance (DOP) and UKCA certificate using the information supplied on your delivery ticket. Product category - Any - Product - Any - Asset Language - Any - Company/Plant - Any - Your search yielded no results. Request a Declaration of Performance and/or UKCA certificate Submit a request for a particular certificate for aggregate and asphalt products or contracting services. Cement If you require a CE-certificate for material supplied prior to 2021, please contact cement.customer.services@hanson.biz Please note: Materials supplied prior to 1st Jan 2021 will include a CE certificate. Current Materials are supplied with a UKCA certificate.