I'm not sure there is a set format for risk assessments.
They should contain
-COSHH information. Basically, any chemicals you are using which can be considered harmful should be included, with the risks and disposal procedure, along with info on cleaning up spillages and what to do if they're swallowed, get in eyes etc.
A list of other risks and what you're going to do to minimise these risk. So, for example, Risk of end flying off, people getting hit, people catching fire etc.
They, ideally, need to cover every eventuality. I'm better at the COSHH stuff than at the other side if I'm honest
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Ancient wiseman say "It is very strange person, who, when left alone in room with teacosy, does not try it on"