Here is another Highway code rule shared by the DVSA. In this one it’s about the rules on Motorway signals with the Highway Code.
The Highway Code applies to England, Scotland and Wales and is essential reading for everyone.
Red flashing lights. If red lights on the overhead signals flash above your lane and a red ‘X’ is showing, you MUST NOT go beyond the signal in that lane. If red lights flash on a signal in the central reservation or at the side of the road, you MUST NOT go beyond the signal in any lane. Laws RTA 1988 sect 36 & TSRGD regs 10 & 38