Houses were demolished under Labour and replaced by better, in certain areas, this is doing the same , in particular regard to high rise housing ( which needs to be got rid of.)Sink estates are horrible to live in and people deserve better. So, it has been done before, it can be done again.It would no doubt be done in phases, and people rehoused temporarily until the new houses are ready.Nobody is saying it will be wonderful until tenants are rehoused back into that area and the new houses built, but that is what always happens when houses are demolished, and it would be worth it to have a nicer place to live. Listening to radio 4 today I heard that the last time this was done ( when Brown was PM) some tenants did not want to go back to the old area and some did, so that woukd likely be the case this time too. For heavens sake, so many moaning minnies for the announcement of something good to happen to people, and this is hardly something new and untried, it's been going on since the original slum clearances.
with the best intentions, the high rise flats were designed to give tenants a good standard of living, but today are often dreadful crime ridden places( talking about the bad ones here) where police fear to tread.