Strong DLS across the double-structured cold front will likely result in some notable line convection developing as it tracks gradually eastwards, especially from the Midlands / W Country across to E Anglia / SE England. There is a non-zero chance of some embedded lightning with this activity, although the main risks will be a brief spell of very heavy rain and strong gusts of winds. Slight chance of a tornado too.

The post-frontal environment will be characterised by ever-steepening lapse rates as cold air aloft overspreads relatively warm SSTs. Showers will become frequent across Scotland, Northern Ireland and the Republic of Ireland on Monday, becoming more widespread into England and Wales on Monday night. A broad LOW has been issued to cater for rather sporadic lightning activity possible with these showers, accompanied by some small hail (and sleet/snow on high ground in particular, but not exclusively so).