I think you may need to read the Note by the Health and Safety Executive in your regs. BYB page 11.
Our interpretation seems to differ.
I presume this is the note which states that earlier practices are not necessarily unsafe. This clearly suggests that, by the same token, that they are no longer necessarily considered safe either. In other words you need to make a judgement call.
Your inspection is still required to be carried out against the current Standard.