I personally saw no evidence of racism on my trip to the UK.
I believe having run a worldwide empire made Brits more worldly.
I believe there is some animosity towards people from Pakistan from what I have read.
Immigration, because it tends to make British housing even more expensive, is an issue.
I heard a white English guy complaining about Scottish bagpiper on the main shopping street in London. And many white English look down upon the Irish, and also on redheads. Harry may have squelched some of that redhead talk. But now look.