Proton driver scenarios at CERN and Rutherford Appleton Laboratory

The concept of sharing a high-power proton accelerator (proton driver) between neutrino production and other facilities such as a high-energy collider or a spallation neutron source is an attractive, cost-effective solution which is being studied in site-specific cases as part of accelerator upgrade plans at CERN and at the ISIS facility at the Rutherford Appleton Laboratory. Descriptions of these proton-driver scenarios will be given primarily in the context of the Neutrino Factory, but other neutrino production plans at CERN will also be noted.