That shows a 21% increase.

However, its not the same number at all. it is median real disposable income per head (person), whereas the the EU number is mean real income per household.

I think it is probably correct to say the UK has broadly speaking performed about as well as obvious peers such as France and Germany over the last 20 years, but its not greater performance for any of them.

By “flat” you mean “similar” ?Because your link shows approx 22% increase.