My trip to Castlemilk feels like visiting a distant relative: familiar, friendly but not something you choose to do often. Several of my relatives live – or used to live in the scheme, one of Glasgow’s four major peripheral post-WW2 sprawls designed for the fleeing slum-dwellers of the 1950s and 60s, built on the city’s greenbelt in response to a desperate need for housing. The word adequate comes to mind – if having a flush toilet in your house…