What if our worker was booked for one type of shift but done another type of shift?
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Then this shift would need to be amended by the care organisation.
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For example when submitting timesheets for Nurses who worked in charge, should their role on Florence state Nurse in charge to ensure appropriate rate for invoicing?

Yes

In this example:

When submitting timesheets for Nurses who worked in charge, should their role on Florence state Nurse in charge to ensure appropriate rate for invoicing?

The role will be based on the shift the nurse is booked for. If a nurse is booked for a shift as a nurse in charge. This will be indicated in the role and also when submitting the timesheet.