My aunt recently got me these things. I'm not sure where she found them but they're pretty cool! The IRTC booklet is named to a Ted Tilley. Almost everything is dated and named. The last page of the booklet has a ton a signatures on it, perhaps Ade would be so inclined to help me with research?
These things came as part of a grouping along with a nice minty tailor-made Chief Petty Officer's jacket with bullion insignia. Here is the link if you wish to see it: