design includes the preparation of plans, particulars, drawings, specifications, calculations and other expressions of purpose according to which the construction, extension, alteration, repair or renewal concerned is to be executed and “designed” shall be construed accordingly.

“Design Certifier” means the competent, registered professional person who has been commissioned by the Building Owner to design, in conjunction with others, the building or works described in the relevant Commencement Notice (or 7 Day Notice), and to certify such design is in compliance with the Second Schedule to the Building Regulations insofar as they apply to the building or works concerned, and who confirms that the documentation included in the schedule to the Commencement Notice (or 7 Day Notice) which has been prepared by him/ her, other members of the design team and specialist designers whose design activities he/ she has coordinated, has been prepared to demonstrate such compliance.