I worked on this coach from time to time from September 2005 until January 2018. After her overhaul she was fitted with standard 27 way Multiple working (Blue Star) all of the EP Braking was remove and the 36 way (Southern region multiple working also removed, as long there is a locomotive is fitted with blue star multiple working it will work with Caroline. As for the 47s they have green circle multi working but can be easily converted with a blue star/green circle jumper. The locomotive must have ETH/ETS to provide axillary power which converted by an MG. So 31/4, 33 & 33/1 33/2 37/4, 47/7/8