Whilst some training suppliers could only supply the total NEBOSH Construction Certificate and NEBOSH Fire Certificate programs, forcing you to have to sit by way of every week of learning the NGC1 unit that you've got already achieved (and charging you for the privilege!), some supply 'Conversion Courses' for those who have already accomplished the NEBOSH General Certificate and obtained the NGC1 unit, and simply must do the additional items necessary to acquire the NEBOSH Construction or Fire Certificates.