YYZ thanks for the info, I'm not sure if that's practice yet in the uk- perhaps I'll ask the tatooist.
Turkish, I'm not sure if that's still true. Theres an (old) medical adage , that women presenting with a tattoo were tested for syphilis, as they were more likely to have lead a promiscous lifestyle.
Jammy, good point, but wouldn't actually affect your management in an emergency situation.