Aerial was from here
http://www.dabonwheels.co.uk/Kinetic_DBA-5001_DAB_car_aerial.html
Fitting was much easier than I expected.
You need to remove the internal plastic trim from the boot to get to the back of the FM aerial and then it simply u screws.
Fitted the new one and ran wire to headunit.
Full signal straight away and never had any burble since.
One thing to note. If you have the factory satnav, you'll lose TMC as it uses the FM aerial. I didn't realise this when fitting and took me a while to realise. No great loss though.