Good example, that Regulation does say for 'type approval' of a 'standard plug' the plug should confirm to BS 1363. However it does also have the text below which I think gets us back to the same situation as I described above - the standard is a great way to show conformance, but the standard is not required as there are acceptable alternative ways.
(3) Notwithstanding the provisions of paragraphs (1) and (2) above, a type of standard plug may be approved by a notified body where plugs of that type do not conform to BS 1363 if when determining an application for approval the notified body is satisfied–
(a)that–
(i)the plugs are constructed using an alternative method of construction which provides an equivalent level of safety in respect of any risk of death or personal injury to plugs which conform to BS 1363 and is such that plugs of that type may reasonably be expected to be safe in use;
(3) Notwithstanding the provisions of paragraphs (1) and (2) above, a type of standard plug may be approved by a notified body where plugs of that type do not conform to BS 1363 if when determining an application for approval the notified body is satisfied–
(a)that–
(i)the plugs are constructed using an alternative method of construction which provides an equivalent level of safety in respect of any risk of death or personal injury to plugs which conform to BS 1363 and is such that plugs of that type may reasonably be expected to be safe in use;