As for the UK, I am not very sure if its cheaper than other countries. I think I have seen it in other forum that its about £18xx but I cant find the thread now. Anyway it will be cheaper than in HK and you will get tax refund too. Good luck ^_^
I did some research on the Purse Forum and found that there is a shop in Barcelona. I went there the first day after arrival and was really really lucky to find it as this was the only GP on the shelf!
The color is Rouge H. I was thinking of getting either blue or dark pink but didn't get to see them. Instead I saw this one and it looked pretty good to me :)