hi there,
if you search the forum then you will find risk assessments discussed, you will also find some documents, in the download area.
the HSE website, also details risk assessments, in detail
a risk assessment, is a work task specific, and should also be site specific document, that looks at the task, and any risks attched to that task, and then the identification or risk reduction, and the method to reduce the risk.
there you go
regards
martin