I strongly suggest that you have these done professionally. People think they can get away with copying other people's or downloading them from the net. OK until something goes wrong, then, if they do not comply with the latest legislation you could be totally screwed.
Don't under estimate the need for professional advice in this field.
I use 'Risk Assessment Solutions' they are reasonably priced and really know what they are talking about. www. rams.org.uk (remove the space and paste into explorer address bar).
Andy