I am signing because it is time. Time we stopped teaching and learning history like white British people have existed in some kind of vacuum. It's time we understood that our wealth and industry is inextricably and causally connected with the poverty and underdevelopment of other parts of the world. Its time we understood that 'we' is all of us, all over the world; that people living in India or Ghana, or Jamaica are not 'others', they are 'us'. Its time we all knew about all our histories and all our cultures.