Why reserve recruiting facilities have to exist before a crisis

The Cornwall example concerns the absence of a local Royal Naval Reserve unit despite the naval air station at Culdrose. Helston is proposed as an accessible location with an existing service site and a population that includes former naval personnel. A local unit would make participation easier than requiring travel to Plymouth. Saving the cost of a unit today leaves a later problem because recruitment and training both take time. The reserve cannot acquire trained people immediately when an emergency makes them necessary.