Thanks for that, Darrsi. Useful to know.
I see from the
link that my route, the A316 from the M3 to Hogarth, is affected too.
Another line in there, regarding red light cameras, caught my attention:
"In addition to enforcing against "red light running", these new cameras can also monitor and enforce against vehicles breaking the speed limit while going through green traffic lights..."
So accelerating through an amber to avoid the wait isn't going to end well.