Scallywag,
The UK AIC simply reiterates the ICAO standards for ILS, its not UK specific. All countries ILS should conform to the coverage standards contained in ICAO Annex 10 Attachment C figures C-7 through C-12, which are those shown in the AIC with a couple of others for good measure.
Annex 10 is the bible for ground based radionav systems, as opposed to JAR-OPS which is really an airframers/airlines doc. You can get a copy from the CAA library at Gatwick or you can purchase it online from Westward Digital.
Regards.
