BBC/Met Office forecaster Laura Gilcrest commented on twitter
Is that a LEWP?
I’ve not heard of this term before. From Wikipedia
A LEWP, according to the NWAS, is defined as “a squall line that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent.”
The bow like pattern does make it a possiblity. Here’s some screen grabs
Met Office amber warning from earlier today
Sure a few in the Midlands and North West have would appreciated a warning.