Despite the strongest flow aloft over Ireland on the rear side of the upper trough/forward side of upper ridge, here subsidence will result in much shallower convection and therefore weak cloud layer shear. Convection will be increasingly deep towards eastern Britain, in closer proximity to the cold pool aloft. Here, some residual flow aloft on the forward side of the upper trough will also result in 15-25kts cloud layer shear, and this could aid some slight organisation/longevity of cells (if they can grow tall enough). That said, CAPE is likely to be quite skinny due to being stretched over a rather deep layer, but these parameters may just about be sufficient for a few odd lightning strikes and hail - more especially Lincolnshire into Cambridgeshire and Norfolk, and perhaps moreso as they drift offshore and briefly encounter better low-level convergence along the coast due to the development of a sea breeze. Such slack conditions with low-level convergence can aid the development of a few funnel clouds, again this especially enhanced near North Sea coasts. Showers will slowly fade during the evening.