Thanks! You are onto something there, but it's not the same on my installation. I have 9 Map Styles to choose from and only one of these, LightRS, shows road numbers. OsmAnd, and the others, do not.
I don't really like LightRS, and it has only 7 "Map Style" options compared to 9 with the default OsmAnd Map Type. One of the MapStyle options I use is Road Style, and I often switch from the default to "German Road Atlas" as in certain situations it is clearer. But I can't do this when using LightRS as the Style, as Road Style is not available!
I'm sure this has all changed recently, though I can't be sure when the change took place. It does seem strange that the default, OsmAnd Map Style does not now have road numbers, and I'm sure that it used to include them!
Again, thanks for your interest
Tim Kendal