Sooo.... online chat with VWUK . After some toing and froing the chap said 'after consultation it appears as if the light on your key fob blinks continuously when the battery needs changing'. To which I said 'but I know of other mk7 gti owners who get a dashboard notification' . Answer ' that's on older models that aren't keyless'.
Right, so for keyless owners who don't have to take their keys out their pockets/bags etc on a regular basis there is a flashing light actually on the key. For owners who need the key in their hand more frequently there is a handy notification on the dash.
Absolutely unbelievable....and I don't believe it.
The saga continues.