Louisa, I don't think it's a class thing, it's a profitability thing. If you have a business that appeals to customers who don't sit within the middle-class/gentrification/newcomer set, but remains profitable, they stay open. This isn't meant as a snide value-judgement, but I don't see the bookies or chicken shops on LL closing down... and if I glance through the windows of those outlets, I don't notice them full of yummy mummy types blocking off access to the FOBs with their over-sized buggies.