Currently, we include many British spellings as synonyms in LOINC, but not as a separate translation. We’d welcome such a translation if users wanted to produce it. Is this something you would be interested in doing? Here is some more information about joining our group of volunteer translators. Please feel free to get in touch with us!
Thank you for asking! There will be a Public Laboratory LOINC Workshop & Committee Meeting in June and December of 2016. When those dates are finalized, you will find the details and registration information at loinc.org/meetings. You can also find tutorials and past presentations here: loinc.org/slideshows. Looking forward to seeing you in 2016!