It's not misplaced confidence, the new BS has a prescribed testing method for helmets. The new BS tests have been replicated in a lab for certain manufacturers to ensure their helmets will pass the new tests. You should be able to replicate the tests exactly in any suitable lab so as to have a high assurance that your product will pass, so for you to say that nobody could be reasonably certain of passing is plainly false. In fact I can't understand how anybody can come to the conclusion you have in your post.
I hate to go over old ground...but it has been mentioned by a number of posters on this site that Shrey will never be supplied/stocked in the UK because "they will not pass the new test".
Given that Shrey has passed all the testing so far, they would appear to be in EXACTLY the same position as the other brands that have "confidence" in their product.
Shrey hasn't failed any tests in the UK yet.
Much like the other brands that are pressing ahead with production.
So please, can you tell me how some helmets "comply" and others - apparently - don't? Given that they have all passed the exact same industry tests? Given that NONE of them have as yet submitted themselves to the new test?
I await your measured response with bated breath.