It’s a bit late, but I found the Scottish tourist attraction symbol here
Technical information about traffic signs and *.pdf files for most of them can be found on the Department for Transport site
The *.pdf files do contain vectors, but have loads of surplus points. I imagine that they were not created using Illustrator but distilled from something else. They would be a good starting point though.
This is the page of links I mentioned the other month that has been missing for a while.
Please note:
This action will also remove this member from your connections and send a report to the site admin.
Please allow a few minutes for this process to complete.