For the most part, instability is a little marginal for much in the way of lightning - however, strong shear and steep mid-level lapse rates aided quite a few lightning strikes on Monday evening over western Scotland and NW Ireland, and it is likely a similar magnitude of shear over the Midlands, southern and eastern England combined with strong forcing aloft and marked mid-level dry intrusion will aid in some sporadic lightning across these areas during Tuesday afternoon (moreso as they move offshore to the North Sea) - and so a low-end SLGT has been issued, despite somewhat restricted convective depth. Hail and gusty winds will accompany the most intense cells.