This is the original colour scheme the units were delivered in before being claimed by
various operating companies after the privatisation of British Rail in the 1990s.
The Class 158 is DCC Compatible but is not provided with a socket or plug. Common opinion is that a lot of work is required to install a decoder to this model.
Information on installing a DCC Decoder to a Class 158 can be found by clicking on the following link http://www.bachmann.co.uk/pdfs/issue8.pdf