Venetia Thompson, who has never taken the drug, was shocked to discover a stash in her house. What to do? Her friends’ response was a collective shrug as if it were nothing unusualIt is said that in London, you are never further than ten feet from the nearest rat. It seems that, these days, the same might just as easily be said of cocaine. Recently, while gathering up my washing, I discovered an unfamiliar sock. This was immediately bizarre, as I recognise all of my socks; there are not many of them, they very rarely travel in matching pairs, and can usually be found lurking in dark corners of drawers next to a forgotten flight sock that I keep, just in case I decide to opt to prevent a DVT in just one of my legs next time I fly.