Hmmm, well I do live there (practically in both, as it happens, being right on the border). And I did move there by choice. And I do, most of the time, enjoy living there. So you may find my competition entry would be more positive than most!
I was getting an Abel and Cole box for a while (I live at New Kent Road), but sadly they rarely followed my instructions of where to leave it when I was out. After it was stolen (from inside my building), I cancelled.
It's the higrise issue....
HSBC did mortgages for such buildings at some point.
Please bear in mind that HSBC do not deal with any mortgage brokers - so you will have to approach them personally. I used the branch at Moorgate about 18months ago and was happy - I got my mortgage for a concrete frame highrise....
In some other thread on here I once read that HSBC weren't doing them anymore but now it was Abbey National (I think) - That thread was about the two towerblocks called Burwash House and Simla House on Weston Street - maybe worth searching for it.
The flats in Perronet House are very spacious and airy. I think they still have single glazed windows which would be replaced at some point - good luck!