Given that the standards were only recently published, I don't doubt that a certification rig is not yet available. That's pretty standard practice. The Standard will define what the tests required to be passed are, and it will be possible to undertake these tests independently, as FvanN says, to provide a very high level of confidence that your products meet requirements.
As an aside, according to the BSi, Cricket Helmets are tested at a lab in Hemel Hempstead, so I'm not entirely sure why a testing machine in Loughborough being ready would have any impact on the ability to undertake a BSi Certification.
Having said that, looking through the literature and commentary, I also don't see anyone from the manufacturers explicitly stating that their products meet the new standard. What I do see is evidence of people talking about safer products and being tested in certain ways, and using terms like "helmets excel under both of these test conditions" and "we would only sell products that comply with the latest standards to meet insurance requirements" allowing kit nerds like us to draw our own conclusions. I'm sure no manufacturer will make statements about being certified until they truly are.