Hi,
Perhaps the last bit you mentioned can be your main concern, as it's not a nursery setting but a home you probably don't have the security measures nurseries or schools do, such as, coded doors or security gates etc. Another concern could be that because it is a home do you get unexpected callers? Or anything that can be seen as a threat to the children in your care or the environment?
So start with an introduction, what the report will be about, then into the main section with concerns regarding practice along with the consequences... have you experienced any scares regarding security? What policies and procedures do you follow to overcome these? Do you get support or guidance from the local authority? How does your daily practice in relation to security differ to mainstream settings etc. Next is your conclusion, summarise and round up your findings and what you have put into the report. Finally recommendations can be anything you may have referred to in the report: policies, procedures, guidance, legislations etc.
Hope this helps a little