Once a uCheck countersignatory has countersigned the application:
No further changes can be made to the information declared.
You cannot edit role details, applicant information, or eligibility-related fields after this point.
The DBS will collect (sweep) applications from the uCheck system every 15 minutes.
This means there is minimal delay between:
The moment the application is countersigned, and
The moment it enters the DBS vetting process.
From that point on, the application is with the DBS and relevant police forces for vetting, and the usual tracking and turnaround rules apply.