Hi Andy. I can't see any thunderstorms forming anywhere tonight. The surface temperature overnight will be too cold to promote thermals needed for convective cumulus activitiy. If anything, ground frost should be more of a concern if you're a gardener!
Tomorrow, confidence for any storms anywhere in the UK is low as a temporary ridge of high pressure (that usually prevents build up of thunderclouds) moves over the UK.
Thursday, a depression system will move from west to east over the UK bringing a spell of thicker cloud, drizzle and rain before things slowly improve by the weekend with sunshine and scattered showers.