Clicking noise in car synchronised with red light flashing on key fob

[Elliotc]

Hi All...When driving I hear a clicking noise in the car...bit like fast morse code...sound like it's coming from the centre between the front seats.  That noise is synchronised with the red light flashing on and off on the remote key fob.  It lasts for about 10-20 seconds.  it happens very soon after pulling away and sometimes during a journey.  There are no warning lights.  Any ideas?!