I've just done this with the help of
www.dabonwheels.co.uk.
They supplied the DAB Ariel and the required leads. Pretty straight forward but dropping the headlining on My ED30 was kinda scary!!
The DAB will work with the standard arial connection as a previously mentioned but will cut all the time and you won't pick up everything.
For 12v feed to arial I simply took a wire from the 12v power point in the boot.
I would allow yourself a whole day for this and a second pair of hands!