I'm assuming the OEM radios for the UK are the same size and shape as they are for the U.S. Jeeps.
So a mounting kit for this radio would either have to replace the entire cover plate or mount kit with half circle shapes to fill in the gap left on the sides.
If you have the NAV Radio Option, it might be a perfect rectangle and would need a different fascia/mounting kit, perhaps the one in the link would be correct.
If so, here will be the problem, and its a lot more work, but you can do it. The OEM radio is exact same height as Double DIN but slightly narrower. Hey, no problem, you just need a facia/mounting kit that fills in the gaps on the sides, like we just talked about.
That's until you get the OEM radio out.
Then you compare it to your aftermarket Double DIN radio.
You'll find the body behind the screen of the OEM radio is smaller than the screen, while the aftermarket radio is closer to a brick shape with a larger body behind the screen. So, when you try to slide the aftermarket radio into the opening for the OEM radio, it doesn't fit. Get out your Dremel and start cutting plastic, cause that is the only way to get it to fit.
The steering wheel control (swc) interface looks like a good one. You can use more than just a swc interface, but this one looks like it might have the features you'd want.
Basically the OEM radio connects to the CAN Bus on the vehicle and the CAN bus supplies it information and Commands. In 2006, those CAN bus features were just nice extras, so you don't have to have an interface, the radio can be wired to work without an interface. But without some sort of 3rd party interface to talk to the radio, you'd lose:
Steering Wheel Controls
Retained Accessory Power (RAP) where the radio continues to play for 10 minutes after removing the key
Reverse, Speed and Parking Brake Information, if a parking brake signal is required for a video radio, you'll have to rig up a mechanical switch to the parking brake or splice into the existing switch.
The one in your link looks like it has those functions as well as SWC, no mention of the RAP, but that's no big deal.