Check.

"Ireland [...] was the poorest country in Europe"

https://en.wikipedia.org/wiki/List_of_countries_by_past_and_...

Check 1972 figures.

Spain and Greece were poorer. The unlisted Soviet client states were likely even much poorer.

"Poland or Hungary is close to catching up with Western Europe."

Poland and Hungary have 1/3 the per capita GDP as Britain. ( https://en.wikipedia.org/wiki/List_of_countries_by_GDP_%28no... )

"Greece had about the same GDP per capita as Turkey when they joined. Today, it’s closer to 3x Turkey."

( see previous link). 2017: Greek per capita gdp =~ $18.6K, Turkey =~ $11.5K.

Also (see https://en.wikipedia.org/wiki/List_of_countries_by_past_and_... ). Greece joined in 1981: Greece gdp per capita ~= $5.3K, turkey gdp =~$2.2K.