If a local copy is permanently stored, and all clinicians have the ability to 'search & pull' imaging from across the country, is there a local storage capacity risk for NIR users?

Yes, this has been raised with the NIR clinical working group. Papers and recommendations addressing the issues raised will be released when finalised. For example, the duplicate policy is now on the governance webpage, as well as the NIR Hazard log. https://digital.nhs.uk/services/national-imaging-registry/governance

Please engage with the DDC around this as part of your funding application.