Once is a happenstance, twice is a coincidence, but three times is a conspiracy. First the maid of Chalk Farm is painted over (since restored), then we heard the Rosebery Avenue cash machine stencil has also been defaced. And today, it seems the Clerkenwell Road 'Old Skool' pic has been 'collected'. The mural had been surrounded by sheeting for a few weeks, so many suspected it was being removed. But who's doing it? Councils?......