red tape , she has 4 sons and 3 daughters of certain ages, the law requires them to have a certain amount of personal space, they may have tried in vain to find suitable 4,5 and 6 bed properties, sadly most properties are converted for students or house share now and its very difficult to find private landlords that will accept DSS. Its a shame that so many people on the waiting list have to live in unsuitable accomodation.
if they were homeless then there would be the need to rehouse them ASAP, if they were living in unsuitable council accomodation like so many people on the list then they would have probably had to stay there for as long as it takes to find somewhere suitable
its only the fact they were homeless that got them the move, the house they got was purely down to availability