Yep have exactly same issue. Mine is the standard Gen 5 (MY18) software but unfortunately like you, the speed limit signs now show (- - -) and there is no data for the speed limits.Upgraded the infotainment system today version as image.
View attachment 12599
Had a quick look around the upgrade & not much has changed.
The only problem I've seen is the road speed limit info icon in the nav screen & instrument binnacle is not displaying a speed just three - - -
Anybody know how to fix this issue?
I think they’ve either mistakenly missed the data from the latest update or the update was never designed for U.K. markets (but I’d assume if you drove in Europe etc you would get speed limit etc so can’t see that would be the issue)