Water coming in through roof light of Ford Focus

Hi folks

Got in the car this morning only to find that the roof lights (above rear view mirror) on my 2006 Focus were full of water & is leaking into the car.

I don't have a sunroof and the windscreen seems to be OK. The only thing I can think of is that it might have something to do with the aerial?

Anyone know what might be causing this & how to fix?

Many thanks

Unscrew aerial and put a blob of silicone on it.

As easy as that? Phew!!

Many thanks mayobob