What do I need for a Sony car stereo in a ford KA 2004?

Ok so I'm currently in Australia and I'm looking at buying a Sony stereo to take back to England with me for my Ford KA. I know that I already need to buy a new fascia, wire harness and aerial adapters but some people are saying I need another wire harness specially for Sony. Is this true if so will it come with the harness or do I need to buy it separately?

Hi so what happens when this sony radio goes faulty. As it's warranty is null and void here in the united kingdom when purchased elsewhere. Yes all electrical things need to be brought it have to pay import duty and VAT as well as new here just the same.
i suppose this fact has not crossed your mind. You could also be importing bugs side it to.

The Sony harness that plugs into the back of the radio will come with it. Your problem could be that it will have Australian colour coding not English so check exactly what each wire is for, The new harness may have a plug on one end and lose wires

Andy C