"Perhaps you could list the manufacturers who have produced products using RISC OS 5?" How about the countless hardware platforms that Pace used it on? RISC OS 5 already runs on more hardware platforms /now/ than RISC OS 6 does.
I think your response needs some serious citations. Perhaps you could answer my original question. i.e how about listing the actual products that Pace produced that used RISC OS 5, and more interestingly those that come up with any form of banner or copyright attribution to Castle Technology and state that the base OS of the product is RISC OS 5 copyright Castle Technology 2004 (or later).