It acts like the British were innocent in the civil war. They weren't. They were actively arming and financing the south because they stood to benefit from internal strife in the US, even using their scottish rite southern jurisdiction freemasonic web to help support the KKK (bet you didn't know that one). Palmerston actively engaged in oligarchical subterfuge against the US, and besides the US angle was one of the primary actors behind the 1850 onwards expansion of the British empire worldwide (which they later, for pr purposes, changed in name only to the commonwealth). As part of this was consolidation and removal of what Palmerston called the "arbitrary powers", such as Austria and Russia into that empire, largely through false "national liberation" policy (sound familiar?).

To act as if it was simply the Trent affair that was a main potential instigator of war between the US and Britain is to be extremely myopic about the bigger picture at play. A key forgotten piece of history in this saga is that the Russian tsar was also under threat by the British because they came to him to join them against the US and he refused and then sent two fleets of ships, one to NY and one to SF with sealed orders to attack anyone who attacked the US (in 1863), because the British were prepping for the post civil war collapse invasion, and they even had proxy-troops amassed on the Mexican/Canadian borders! For do not forget under Palmerston, England supports all revolutions, except her own. I also theorize this is why they financed the bolsheviks and post-Bakunin anarchists and assassinated the Tsars sons family later, in revenge for foiling their plans, besides the added step of consolidation/removal of another rival monarchy, as they were doing across Europe.

There is also evidence the the assassination of Lincoln wasn't just a lone nut, but had British backing. (Funnily enough, many US presidential assassinations match this pattern).

The death throes of these losses by the British are the setup for the following world wars, which were engineered largely by Edward the 7th.

If the British had attacked the US during this time using the Trent affair as the excuse, they likely would have created a US-Russia-Prussia coalition that probably would have won, essentially having WW1 in the 1860s instead.

This style of British subterfuge continues to this day.

https://www.youtube.com/watch?v=50_iRIcxsz0