I’d argue quite strongly that the Google maps style assumes people only use cars.

On my wall at home is a copy of an early 20th century London map. The main railways are black, and the most visible. Only roads with but or tram routes are coloured, the remaining roads being white, distinguished by width to some degree.

That looks like a map of a city designed for people, not cars. These days, I’d add designated cycle routes.

As fairly large parts of the OSM community are cycle-based, designing a map style suitable only for Top Gear fans seems to be not something we’d want to do.

Buildings/addresses are my current project. Otherwise bus routes and destinations. Shops and other workplaces - offices, works and ‘craft’ are even worse than shops.

The postcode issue is a problem. My local authority (Medway) is very bad about putting up signs for new roads, let alone putting postcodes on them. There are at least a couple of roads I’ve personally checked where I’ve checked there’s no nameplate and someone has then put the OS Locator name in the database.

Lowest level postcode areas will go across streets and some of the larger social housing blocks will have several lowest level postcodes - I lived in one with 3, divided by floor.

Electoral roll may be good for postcodes.

Postcodes also change with changes in sorting offices.

It’d be nice if part of the competition regulations for the privatised Royal Mail meant that postcode data was equally available to all under opendata. Can’t see a reason why that should not be the case.

Apart from administrative boundaries, postcodes are the biggest case I can see for importing anything (NAPTAN’s helpful, but not absolutely necessary).

When I started mapping housenumbers, I used Karlsruhe-style interpolation ways. Where I hadn’t yet drawn buildings, these would end up as nodes not in buildings.

When I had drawn buildings, it’s rather random whether the nodes for the interpolation way were inside the building or not.

Now, I’ll put addresses on nodes for entrances to flats, and addresses on ways/areas for distinct houses (which can be terraces). In the UK, that looks a logical way of doing it.

Of course, requiring relations will mean it just doesn’t happen without easy support from editors.