Hi Glen
Congrats on getting the interview in the first place. Day centres vary with respect to the clients that attend them - some may be for older people, others for disabled and others for people with special needs not specfically creating a formal disability. I suggest that you contact another local authority and ask them what they have. Don't contact the authority you will be having the interview with as it can be seen as canvassing and they may refuse to let you continue with the selection process. In most day centes people are brought in via some means of transport - may be provided by LA or may even be their own/taxi. So I suggest you think of a person's path from arriving at the premises , entering the premises, walking around and leaving. In between consider some of the activities that they may be involved in - some provide exercise routines which may include dancing. What floor covering is there as carpets for instance are very good re slip resistance but with people who shuffle because of infirmity they create a high risk of falling. As your presentation is just 10 minutes you will have to generalise to a certain extent but I would consider the above to give you enough. I would mention where incidents are likely to take place and why and then give a possible control to prevent. Remember people's footwear may be a problem in some day centres so take this into account.
Best of luck
John C