Somewhat weak instability and limited convective depth suggests any lightning will probably be quite isolated - except perhaps western Ireland where much deeper convection, with an increase in instability and steeper mid-level lapse rates, will likely develop during the early hours of Thursday. However, given fairly saturated profiles (complicated somewhat by the passage of an occlusion, and general areas of showery rain) confidence is not particularly high for much in the way of lightning - but have introduced a low-end SLGT.