A multiscale X-ray imaging Centre will be established in the British Museum, with a unique range of capabilities in the heritage science sector. The Centre will comprise: (i) Our existing large-scale X-ray imaging laboratory, the X-radiography Suite (ii) A new high-resolution micro-computed tomography (micro-CT) laboratory. (iii) High-performance workstations for users to analyse and visualise data. (iv) An Access Manager to provide access to the Centre for the heritage science community. X-ray imaging is a fundamental technique in heritage science, providing a non-invasive way to look under the surface of archaeological and heritage collections. CT scanning (three-dimensional X-ray imaging) has limitations for different material types and/or object size, with instruments typically providing a trade-off between the size and density of object they can accommodate, and minimum feature size they can detect. The X-radiography Suite in the British Museum is capable of imaging large objects (e.g., sculptures, coffins), and its high-energy X-rays can be used to see inside stone and metal objects. A new micro-CT scanner, capable of microscopic-level X-ray examination of smaller and less dense material, will enhance and complement the capabilities of the X-radiography Suite. The Centre will provide a dynamic environment where objects can be scanned across both instruments, exploiting the relative benefits of each, and providing a single location in which diverse material assemblages can be imaged. The Centre will be used for a wide range of applications, including the examination of skeletal remains to research ancient health and disease; characterising the use of wood, textile and human/animal remains in crafted objects; the study of minerals, organic matter and production techniques in archaeological ceramics; understanding the manufacture and restoration of sculptures; and revealing hidden text from rolled scrolls. As well as research outputs, X-ray imaging has enormous potential for public engagement through visualisations displayed in exhibitions, gallery displays or online content. Currently there are barriers to X-ray imaging in heritage science, in the cost of purchasing or accessing equipment, staff capacity to facilitate access and staff expertise to interpret scans of complex objects. The British Museum is well-placed to complement the existing landscape of CT scanning institutions and frameworks in the UK: its scientists and curators have world-leading knowledge of heritage collections and are experienced in handling and examining cultural heritage material. The Museum has an established logistics infrastructure for the transport and secure storage of heritage assets, and a strong track record of utilising X-ray CT in academic publications and exhibitions in the UK and globally.