Oh I’m well aware of the fact that there were divided opinions in Britain. To try to ascribe any analysis that noted secession and Lincoln’s decision to start a war to impose federal government rule over the Southern states without their consent to “they wanted to take the US down a peg” is ridiculous. Many of them could see exactly what was going on and it wasn’t about slavery.
Yes, I know, they were lying about slavery, just as everyone else who doesn't go along with your revisionism was.