4.— (1) The Board shall, as soon as is practicable after the commencement of this section, establish and publish on its Internet website, and maintain, a list (in this Act referred to as the “List of Interchangeable Medicinal Products”), in such form as it thinks fit, of groups of medicinal products in respect of which it is satisfied, in accordance with section 5, as respects each such group, that all the medicinal products which fall within the group (in this Act referred to as a “group of interchangeable medicinal products”) are, for prescription purposes, interchangeable with each other.

(2) The Board shall arrange for that part of its Internet website which contains the List of Interchangeable Medicinal Products to ordinarily be accessible by members of the public.

(3) In any legal proceedings, a certificate signed by the Chief Executive of the Board, or an employee of the Board authorised by the Chief Executive to give a certificate under this subsection, stating that a medicinal product specified in the certificate—

(a) falls within a group of interchangeable medicinal products specified in the certificate,

(b) does not fall within a group of interchangeable medicinal products specified in the certificate,

(c) fell, at a specified date or during a specified period, within a group of interchangeable medicinal products specified in the certificate,

(d) did not fall, at a specified date or during a specified period, within a group of interchangeable medicinal products specified in the certificate, or

(e) has never fallen within any group of interchangeable medicinal products,

shall, without proof of the signature of the person purporting to sign the certificate or that the person was the Chief Executive of the Board, or an employee of the Board so authorised, as the case may be, be evidence, unless the contrary is proved, of the matters stated in the certificate.