Unable to answer "What basic shape does this building’s roof have?" – house number 26: Residential Building – osm.org/way/523500042 via StreetComplete 57.1:

Hip& Gable

In context of overlay "Buildings" – house number 298: Apartment Building – osm.org/way/572800109 via StreetComplete 57.1:

Amersham Mews

Unable to answer "What’s the house number of this building?" – Residential Building – osm.org/way/572800110 via StreetComplete 57.1:

Not clear where this building is accessed from

Unable to answer "What basic shape does this building’s roof have?" – house number 308: Detached House – osm.org/way/572800115 via StreetComplete 57.1:

Not clear from street

In context of overlay "Buildings" – Detached House – osm.org/way/572800105 via StreetComplete 57.1:

Hutton House

In context of overlay "Buildings" – Building Under Construction – osm.org/way/1243088827 via StreetComplete 57.1:

Buildings under construction are detached, not attached