The project involves 8 groups, all leading experts in the field of diamond material processing and application of diamond to quantum information. It strongly relies on recent developments in the synthesis and processing of high purity isotopically engineered intrinsic and doped single crystal diamond, the production and functionalization of diamond nanocrystals, and methods of controlled activation of defect centres suitable for quantum computing. Such developments will also benefit to diamond colour centre based single photon sources for quantum cryptography.