Ah ok, so likely a previous owner had a DAB aftermarket head unit fitted.
I was worrying it was something which may have had a less passive purpose, but if it’s just an aerial I’ll possibly keep it for a future head unit upgrade myself!
The R32 will hopefully be a worthy successor. Just a lot of little tidy up jobs and subtle tweaks to get it right. First thing was a stiff bonnet (needed lubricating), and this weird antenna.
Panholio, by any chance did you own a 306 GTi6 in the mid 00s?