Viewing a ground floor flat, there are a total of 4 flats in the ex-council block in question. Apparently the "two upstairs look after the roof and the two downstairs look after the drains". No one knows if there's a written agreement. But caring for a property is more than roof and drains surely? The only charge is a small ground rent to the freeholder. No idea about buildings insurance but there must be some!
I'd worry I wouldn't get a mortgage on that basis - what do you think?