Jeremy Vine listeners mainly consist of the "Middle England" lot, inherited, in the main, from Jimmy Young.
When not listening to Jeremy Vine, they can usually be found wandering the
Jet Blast forum.
I wouldn't have thought they'd be too much of a threat to GA, they'll move onto some other burning issue soon, the poor quality of pou pourri nowadays or the birching of yoofs in hoodies or such like.
Funniest thing I heard on his show, was when some old dear called him Jeremy Kyle
and told him she thought his morning TV show was fantastic.