Had it done at warrington car radio. Cannot remember the exact breakdown of costs, but think it was £200 for the radio and then £100 for the steering control adapter leads, double din facia thing and the fitting. I was very pleased with the service. They price match the hardware as well.
thanks for that bluepowell, I want to get this done but as worried about whoever doing it marking the fasia and not knowing about leaving the existing B&M unit connected to the CANBUS to stop a flashing odometer. Will look them up