Graffiti now appears in galleries and museums worldwide. Artists who were once hoodied, hidden and nocturnal are out in the open, working in broad daylight from cherry-picker platforms. In East Ended you see every code of cool fashion and attitude, alongside scenes of poverty and people on the streets trading in anything but the cool. Gentrification has brought a numming sameness. Yet look carefully and you'll spot the cheeky protest posters - political critique to climate change resistance - purposefully plastered over and defacing the ads. The voice of the streets is reclaiming its walls.