My attempted installation of the Help Pack Linux - rpm (x86_64), version 3.6.3, English (GB) failed because the module loaded by the main Libreoffice 3.6.3 install was libobasis3.6-en-US.
“# urpmi libobasis3.6-en-GB-help-
A requested package cannot be installed:
libobasis3.6-en-GB-help- (due to unsatisfied libobasis3.6-en-GB)
Continue installation anyway? (Y/n) n”
Where can I get hold of the en-GB version please?

Take a look here:

Thanks for the pointer. I haven’t had to install the EN-GB language pack before, so now I’ll keep a lookout for the language pack.