Just a change of focus here. I am interested to understand why Britain sought to get involved in the wars on the continent, and over turn the revolution and reinstall a king to the throne. Britain vehemently opposed revolutionary France and Napoleon. Was this a series of wars that they really needed to fight, or were they just on an old fashioned imperialist quest for power and empire trying to bring down a potential rival so they could have a free hand around the world?
I can see that there was a point after 1805 when Britain feared a French invasion, but this was largely in response to the consistent belligerence of the British forming new alliances, encouraging new armies and coalitions against France, and the tearing up of the Treaty of Amiens.
I am also curious as to why the British and the Prussians felt that they had to fight Napoleon again in 1815 after his return to power? Napoleon wasn't fixing for a fight as far as I know. In fact France was tired of war. France was no longer occupying vast swathes of Europe either. What was really at stake?
I actually feel like these are a couple of different questions mixed into one. One would be why Britain felt the need to interfere on the continent at all, being in their rather secure geographical position.
Another would be why they felt threatened or saw a reason to interfere at certain times.
Personally, without knowing much (or anything, actually 😗) about internal British politics, I always figured it was a mixture of a very conservative society reacting to social upheavals that might threaten the status quo, and the old principle of a "balance of power" on the continent (which is the 18th century English translation of "divide et impera" - just make sure they're always at each others' throats, so we don't need to worry about anything going on in our back and have both hands free). It made the British, that's my impression, rather disliked all over the continent, even among their nominal allies (possible exception Prussia, and of course their "continental vassal state" Portugal).
But it's truly an interesting question. I would also love to know in how far the British government was involved in all the assassination attempts on Napoleon Bonaparte during the consulate. I understand Georges Cadoudal lived in Britain, had contact with British agents and was transported back to France on a British vessel?