anyone is making class-action lawsuit in Europe? If nobody, I am thinking to make my own moves. Right now it seems only US customers are taking some action.
There was some British lawyer spamming all over reddit. It's worth remembering that MtGox couldn't pay you even if they wanted to right now - the terms of their civil rehabilitation not only stay any legal proceedings against them at the moment but they also restrain MtGox from making payments to creditors.
My all means seek legal advice on your options, but make sure you're not not being misled into taking futile legal action.