can anyone tell me if a new ringmain wired in 2.5mm lsf twin & earth cable(3 yrs ago) that has satisfactory continuity r1+r2 polarity & insulation resistance test readings.. can be incorperated into a new full rewire to the 17th regs..obvious standout problem being wired in the old colours of red and black ? the wiring is fine with plenty of skts around the ground floor which would save the householder money decoration damage to say the least..obviously the old colours would have to be oversleeved with brown & blue id sleeving at the skts as well as the dis board..and of course protected by an mcb/rcd or an rcbo..(less than 50mm depth) anyone else dealt with this situation cheers again