ISIS-II is the proposal for a next-generation neutron source as the successor for ISIS.

Although ISIS will continue to operate for many years to come, plans for a new facility will be developed over the next decade in order to be ready for construction sometime after 2030. This will maintain and enhance the UK's neutron provision, in a way complementary to the ESS, in order to continue to support the UK research community.

A project has been established to consider the requirements for an ISIS-replacement facility, and to explore the technologies that might underpin this.  This work includes considering the science drivers for neutrons and muons over coming decades and how these will influence the design of new neutron and muon instrumentation.  In turn, these considerations affect the nature of the source and hence the accelerator characteristics. Feasibility studies on accelerator possibilities are ongoing, supported by ASTeC, with the aim of ramping this up over coming years. We plan to increase our support, especially in the areas where we have particular UK strengths such as superconducting RF and Fixed Field Accelerators.