"cafe-closed" is not a building type.

The building is clearly a roof

Clearly building=retail was meant here

"lean_to" is the slightly more popular spelling.

0 out of 10. See me.

Reverting to previous building type and adding disused:amenity=hospital as per recent tagging

I think that "ruins" still makes most sense here, give that story at https://en.wikipedia.org/wiki/Lyveden_New_Bield?uselang=en-GB . It wasn't put up and fell down, but was never fully put up in the first place, resulting in the same state.

Clearly building=roof was meant here

Tidying up The Old School so that there was onlly one restaurant not two, so that the car park was not a building, etc.

presumably "shed" (and squaring the building) was meant here

skittle_alley is the more standard OSM spelling and also more common

dovecote is presumably what was meant here - imagery also suggests that as appropriate

"store" was surely what was meant here

"sewage_pumping_station" was surely what was meant here

"sewage_pumping_station" was surely what was meant here

"retail" was surely what was meant here

None of these are really buildings.

Changed "building=yesm" to something more plausible.

None of these are really buildings.

Changed "building=qr" to something more plausible.