I need the company health & safety policy updated

Our H&S policy handbook is over a decade old and a lot of it is no longer relevant. In addition, for the manual work we now use bona fide subcontractors with the only direct employees being four clerical staff plus directors. In addition to this there is no central office, the clerical staff work from home. I have attached the current handbook for guidance but many sections are irrelevant. The subcontractors are not trained by us and all have their own public liability insurance.