As best as I can tell, there is inequality but it's not something you'll find in earnings data. I think the crystalized generational inequality @ironeconomist.bsky.social mentions explains a lot here, that inequality has definitely skewed towards the already rich.
The graph they show in the thread shows that UK wealth inequality is average by international standards.
Got quibbles with that kind of thing though: - How are these indices calculated? The wealth of the super rich is incredibly opaque. - Older UK people have lots of housing wealth which hides the issue
You can check the sources on eg Our World in Data if you’re unsure but ‘the super rich’ are sufficiently few in number I doubt they move the aggregate stats much. Housing wealth will be included. At some point though you have to accept the evidence you’re looking at