Racism during Imperial Britain has come back to the fore with the recent protests in the US and UK, in relation to the death of George Floyd. In particular, Churchill has been alleged as racists, and by modern standards, that seems to be an accurate description (without this implying a value judgment in itself).
Since the beginning of the slave trade and the entrance of black individuals into the British society, as well as the British conquest of India (17 century, roughly), and until the end of the Second World War (roughly coinciding with the declaration of Human Rights by the UN and the exposure of Nazi's institutional racism), is there any statistic or evidence that "most of individuals" held racists views, either against blacks, Indians, or other non-white races?
The Wikipedia article about racism in the UK is only descriptive, presenting no statistics about the spread of racism. There seem to be a huge literature exploring racism in the UK. This article refers to "popular imperialism" (image building of the empire among citizens as a force of peace and civilization, thereby harboring some of the racists views of the elite), but says this cannot be directly associated to "popular racism". The article does not provide an attempt to measure it either. I have seen a few other papers but so far haven't found an attempt to quantify its spread, not even as a guesstimate. Rather than spending all my time looking for a needle in a haystack, I prefer to ask here.
Anyone can provide more information about this?