Black LINES tell how many roads meet here, and where they point: thicker ones have more traffic. White BACKGROUND OVERALL tells you you're not on a "primary route". (Ref numbers may augment place names: "B4030" is a minor road because it starts with B not A; more so as it has lots of digits). Black BACKGROUND (and the lorry icon) means advised route for delivery vehicles.
The green recycling symbol isn't a formal traffic sign, but I guess there's a Recycling Centre that way!
It is DIA's view that moves will be made to mandate face coverings for trainers, given they have already been mandated for many other professionals working in vehicles, such as bus drivers and now licensed taxi and private hire drivers.
The majority of professional trainers already wear a face covering in training sessions, and require their pupils to also take similar precautions. However, trainers have so far been exempt from face mask rules that were introduced on July 14 for shoppers and those on public transport.
Fines for failing to wear a face mask, where mandated, will rise to £200.
Topics of mutual interest were:
The uncertainties of a post-Covid world mean I doubt serious study will make financial sense in the foreseeable future. But never say never.
So ... "If in doubt, don't pull out". [Spoiler: answer to my initial question is Yes].