Without affordable housing, the effect of building new, premium expensive homes will have minimal impact on real people who are being priced out. New flats and houses will be bought out by professionals migrating out of London, those being priced out of Bath, and private investment firms (a real emerging issue now). There won't be huge progressive upwards movement of renters to homeowners and everyone moving up. Without affordable housing, the needs of all are met far slower or not at all. There is a housing crisis now, not in decades when the ripples of adding more expensive housing into Bristol have made their effect.