Have the applicant and role assessed under the requirements of the route actually proposed, including the blanket specialized-knowledge professional condition.
Review the changed process before scheduling
Confirm relevant entities, qualifications and documents rather than assuming the previous checklist is interchangeable. A company preference for one process does not guarantee that the applicant meets its conditions or a particular start date. Establish which route the company will use before anyone builds a document list, because the two routes ask for different things and the work is not interchangeable.
A blanket proposal carries the additional specialized-knowledge professional condition, so an applicant without the relevant credentials may be eligible on one route and not on the other. Hypothetical example: an organisation providing remote radiology reading services to teaching hospitals switches from an individual petition to a blanket approach three weeks before a planned start date, and a credential question that had never mattered becomes the whole case. Ask the company to confirm the route in writing and to name who made that decision, then re-check the applicant against the conditions of the route actually chosen.
Where a start date has already circulated internally, say early that it is provisional, rather than letting a schedule built on an assumption harden into a promise. Record the date on which the route was confirmed, because that is the date the document list became valid, and anything gathered before it needs re-checking against the new requirements.