Creuseman

I remember reading somewhere that it is now legal in France to use UK type cable i.e. 2.5mm T&E etc so long as the tails are covered with the correct colour sleeveing and it is run in flexi conduit. Is this correct? If so where, except for coloured PVC tape, can you get coulored sleeveing to go over the existing cable. Also is it true that you cannot use UK consumer units (i.e. common negative block) and have to use French where each outlet has live and neutral connections?