I am another who is uneasy about listing buildings purely because of they wer considered to be revolutionary in their day. A case in point is Park Hill Flats in Sheffield. Built in the late fifties, early sixties to house those rendered homeless by the slum clearance programme, these brutalist "streets in the sky" concrete complexes were considered to be the very last word in social housing, and indeed the people who moved into them in the early days could not speak highly enough if them. By the mid to late seventies the council were finding it difficult to find people who wanted to live there and they rapidly became sink estates, with all the attendant problems. They stood all but empty for years, a crumbling eyesore and the first thing people saw when they came to the city centre either by car or by train. Most people favoured them being pulled down. Then in 1998, some bright spark decided to give them a grade II listing. One of the blocks has recently been renovated by a private company and the apartments are being offered for sale and private rent. As far as i can ascertain, there is no "affordable housing" included in the mix. The second unrenovated block remains all but empty and boarded up (i believe there are two tenants hanging on who either refuse to be, or cannot be, rehoused). I don't know what the plans are for this block (except that, given that it is now listed, it won't be pulled down) but it would be nice to think that, if and when it is renovated, at least a proportion of it would be for social rent. I'm not holding my breath though.