score:3
Disclaimer: I don't have actual data, only anecdotal.
Upvote:2
So we ended up heading out rather later than we wanted at 9 AM (because kids), but in the event, there was essentially zero traffic — if anything, it felt like there were less cars on the road than usual!
We went via the M5, which as a bonus seems to finally have finished its endless construction, but I doubt the M4/M7 would have been meaningfully slower.