46. Where in consequence of the proposed construction of any of the authorised works, TfL or the specified undertaker requires the removal of apparatus under paragraph 40(1) or the specified undertaker makes requirements for the protection or alteration of apparatus under paragraph 42(2), TfL must use its best endeavours to co-ordinate the execution of the works in the interests of safety and the efficient and economic execution of the authorised works and the specified undertaker must use all reasonable endeavours to co-operate with TfL for that purpose.