Rather than dig out the older one I thought I'd post a new thread for some potential tomorrow afternoon and evening.

The weakening low moving SE across the SW Midlands into the SE Friday pm brings a surprisingly stout flow at low and middle levels from the west once the main trough clears midday.
Within this airmass are LIs of -3 and a lobe of vorticity generated by about 500 CAPE, and running over the top some coldish uppers - enough in the afternoon and evening to generate convective parcels capable of heavy showers and a few short-lived thunderstorms.

 

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A look at the soundings for Exeter support that view with instability to over 22Kft. Estofex also mention a scattered storm risk in their latest update