I don't think that the UK parties had real differences in really important matters (important is for which you get "labels" on the spot on the Internet).

They just switch, because they are bored on the PM. France is different, in France the goal is to replace, or at least seriously "beat" the whole political elite, so they vote for their most outcast party.

In general, I believe, "left" and "right" is BS and what is important, that is "up" and "down". (more details here)

As the "left" and "right" labels are mostly arbitrarily, there is no need for "close" countries to correlate in their current direction.

In general, if there is a PM replacement, that is the consequence of a general unsatisfiedness also with the political elite, and not only with the ruling party.

I don't think that the UK parties had real differences in really important matters (important is for which you get "labels" on the spot on the Internet).

They just switch, because they are bored on the PM. France is different, in France the goal is to replace, or at least seriously "beat" the whole political elite, so they vote for their most outcast party.

In general, I believe, "left" and "right" are not really important or useful terminologies. What is important, that is "up" and "down". (more details here)

As the "left" and "right" labels are mostly arbitrarily, there is no need for "close" countries to correlate in their current direction.

In general, if there is a PM replacement, that is the consequence of a general unsatisfiedness also with the political elite, and not only with the ruling party.