There will be other bands and filaments of ppn off the SW low. Notwithstanding it going too far south, I think there'll be some interest for the south coast up to the M4 (so yeah SOUTH of the M4)
Separately, Cheshire gap streamers and even into Shropshire I can see some trough action happening right into the Midlands. Don't think this will be as dry as a lot of posters seem to think it will be...