The paper describes the build-up of cryogenic supply facilities for JET, the main loads being the neutral beam injector cryopumps. It deals with the LHe and LN2 supply and distribution system and covers the work through design, manufacture, installation and testing. The cryosupply control employs an autonomous programmable controller operating in conjunction with the JET Central Computer. From the Central Computer the operator can initiate actions remotely, using touch panels and mimics, both for the cryosupply system and the cryopump loads. The cryosupply may be operated locally from local control panels. The cryosupply has been fully performance-tested and has exceeded its specification. The first cryopump load has been automatically cooled down and limited integrated tests carried out.