It appears that the car kit being distributed in the UK (the THB Trendtalk) is being shipped without the cigarette lighter power lead that allows the kit to be used in the plug and play configuration. This means that it has to be installed/hard wired (requiring a visit to the garage or other "technician"). Not a problem if you are keeping your car for the foreseeable future but not great if you are going to be changing it soon.
The instructions in the box indicate that the plug-and-play optional accessory can be obtained from - which is a US outfit and not much help in the UK. I have so far been unable to locate a source for this accessory in the UK - which just about sums up the support for the product over here