Better question: What
isn't an issue with Boudicca?
Some of the highlights: 1) Dreadlocks; 2) "woad" tattoos (presumably not actually woad since woad is caustic and
burns your flesh); 3) kilt...thing; 4) speaking Welsh; 5) ruling from Edinburgh; 6) having a Ceilidh UB, "Pictish Warrior" UU, and "Druidism" UA; 7) swinging around a Saxon-style sword (should be a spear). So to answer my rephrasing of your question, the torc is probably accurate enough, and she was reportedly a redhead. The tartan may be an acceptable interpretation of her "green cloak"--but the skimpy pseudo-kilt is not.