Complex sentence: The constituency consists mostly of residential areas, a majority of neighbourhoods of which were council housing, of which now a slight majority rather than being social housing is private under the Right to Buy such as Bulwell.
Split into simpler sentences: The constituency consists mostly of residential areas, a majority of neighbourhoods of which were council housing. Of these a slight majority, rather than being social housing, is now private under the Right to Buy, such as Bulwell.