I would definitely think about workforce issues and solutions. What recruitment initiatives is the organisation involved in, and more importantly what are they doing to retain staff?
An understanding of the role of community in admissions avoidance, facilitating discharges is helpful, considering the impact on acute bed capacity with dtocs etc. Read the latest cqc report. What areas were identified as requiring improvement (if any) and how would you address them? What examples can you share of working effectively in a multi professional team?
If you haven't already, call the recruiting manager to ask them about the role, priorities and challenges, vision for the service, what they are looking for in a manager, team dynamics. At 8a I would always expect a motivated applicant to contact the RM.
Good luck!