ring mains wire part p reg

[barrie]

have been given a new roll of ring main wire
it is brand new but is the old type in other words the live is red .n is black .
i am laying a cement floor in a extention will be putting conduit to run the wire through .first is this ok for the new reg part p. and will they pull me up on the colour as it is [l.red.[n black.] instead of the now [l.brown.[ n.blue.]