GL Hearn has not done a proper job

If GL Hearn was contracted according to the brief, then it has failed in its contractual obligations, according to section 6, as follows: "6. Project requirements 6.1 The successful consultant will be required to: * develop a robust, transparent and credible methodology" How can GBC judge if it is transparent, or credible, if they can't access the methodology. Section 9 of the T's and C's precludes subcontracting of any 'burden' of the contract. So how can GL Hearn evade responsibility for the model? https://www.scribd.com/doc/298249713/EIR-Response-2942-Guildford-Borough-Council-SHMA-Brief