Long post but wanted to provide an update and what could be an important distinction for Scottish law - which differs from England/Wales. We requested a report of the incident and spoke with the Glasgow police department - “cannabis cautions” do not exist in Scotland. They do exist in England and Wales. At the time of this incident (2010), Scotland only had the option to essentially provide “a verbal warning” or formally charge and arrest someone with possession of cannabis.
Now since 2015, they have switched to a system of “recorded police warnings” for an incident similar to this and essentially for any petty crimes. My fiancé did not get this so I have no idea if these show up on an ACRO/SAR. Recorded police warnings are deleted from the Police National Computer after 2 years. Again, they might still trigger no live trace and be on the SAR. Not sure.
In our case, my fiancé saw a post about someone caught with a small amount of marijuana and because he couldn’t remember - assumed the ticket he got was a cannabis caution or warning. However - it was not. The officer took the joint and did not record it. The ticket he received was a fixed penalty notice for breach of the peace. (His friend and him were sitting in a car park listening to music at the time perhaps too loudly). We only have the record of the incident from the Scottish police so we’ll see if the penalty shows on the ACRO. It will be something to explain, but much easier I would expect than if he had received a cannabis caution.
As for the medical - we will still have that potential barrier, but perhaps less of a barrier than it could have been with a cannabis caution on his record.
Hopefully this could be helpful to someone if dealing with any sort of criminal history in the UK - it’s worth considering the laws and record keeping may slightly differ between the countries.