The EPSRC funded national service is now operated by the Royal Society of Chemistry. For further details of this service go to the CDS/RSC portal
The STFC Chemical Database Service at Daresbury now provides restricted database access, but responsibility for all CrystalWorks developments continues here.

CDS/DL access to CrystalWorks is via the Access Data link at the top left of this webpage. You will also find a number of useful example pages via this link. Alternatively use the CDS/RSC portal.