It should include the name of the project, the people involved and those who will be held accountable for whatever may occur. It should also have an introduction to the plan, the scope of the plan, policies to be followed, the officers involved, the need_to_know for workers in the site of work, details of accident or illness, inspection dates, an appendix for the documents that will be attached and whatever else is deemed necessary.
A good health and safety plan should be detailed enough to highlight all the things you need to consider any health and safety events that could occur in your business. Obviously there will be some things that are specific to your business, however there are certainly things that will not be specific. These would be typical items that could be relevant to any type of business.