Greyfell became a model for other regions, but Daniel resisted calling it a blueprint.
"Places are not copies," he told policymakers. "The problem might be distance in one county and staffing in another. Technology is only useful when it fits the system around it."
The principle took him across Britain and later abroad.
He visited hospitals where PET was routine and others where patients crossed borders for scans.
The contrast made his early question sharper, not smaller.