Hi. When I put on the rear demister my FM radio reception is rubbish. Understand the antenna is in the glass but is there a simple earthing fix for this.x350 XJ Thanks

On my 2005 XJR there was a "gadget" affixed to the transmission case that was there to stop radio interference.

https://www.ebay.com/itm/234131079728

The above is what I was talking about.

Wow that's really helpful. I know what to look for now. Many thanks.

It may not look exactly the same but very similar.

It is quite easy to knock loose and brake a wire.