Andy & Ben

We are moving to France at the beginning of April to set up a branch of  a general builders on the border of the Pyrenees Atlantiques/Landes area. The business is registered in England does anybody know what insurances we will need to be covered?  The business will include brickwork, plastering, decorating, groundwork, land clearence and demolition.  Do we need seperate insurances for the different aspects of the business or if one insurance can cover all?  Thank you