Reading the comments, I'm surprised. Ignorance seems to be bliss
I only lived in Edinburgh for 4 months, and even I knew that Gingers were made fun of in the UK. Guy I was working with was (is?) Ginger, and he would get a lot of crap about it. He was smart as a whip, worked hard, etc - just a generally all around nice guy. I don't think he was refused promotions/pay because of it, but if he had been black/asian/female and the same comments were made about him, he would have had an easy hostile work environment claim. But, talking with my co-worker and some of the folks in the office, it seemed like he was one of the lucky ones. I don't think he worried too much because all he got was a bit of ribbing, but some Gingers really do have it pretty bad.
You folks in the UK are bad, bad, bad when it come to Ginger rights. Perhaps it is time for a movement to protect them.