Stickers are a ubiquitous part of the urban environment, often more common than graffiti in city centres. They are quick, easy and cheap to produce and put up, so they are an effective way of getting a message across. They are employed for a variety of purposes, such as advertising, art and dissent. The meaning of many is not obvious, they remain indecipherable to all but the author and those with the right knowledge to decode them. They also come in many shapes and sizes, with many different techniques used to produce them. Like graffiti they are meant to be ephemeral, gradually disintegrating under the weight of the weather, idle hands and cleaners. As I move around London I photograph many of the protest stickers that I see, gradually building up a map of dissent in our capital. Below are some of the stickers I have seen.