hi there
as has been discussed on here in a lot of depth, contact the building companies to be added to their tender list, at that stage they will most probably send you a questionnaire to complete, at that stage the questionnaire will promt you for info, coshh, generic method statements, risk assessements, cscs, etc,
that is when you will start to buildl the document!!!!
if after the submission of that you scoer high enough on there format, you will be added to the list of potential supply companies, then you will receive the tender pack from them to complete and return.
regards
martin