I think those records are available to anyone. My folks spent some time in England, doing some research. Dad said they have better stuff in SLC. But I know he is in contact with a person in London who does some research. For a fee of course. I haven’t asked him how that is going.
Yes, I have used many libraries over the decades, etc.
I too have German lines, immigrants from the 1740s and 1840s.
Have Dutch immigrants, some 1620s to New Amsterdam (NY)
and 1840s
Around 200+ 9th great grandparents from England 1620s-1630s.
Have gone back beyond the Middle Ages with many of the lines in detail.
Over 12 5th & 6th great grandfathers who served in the Rev. War including two sons of German immigs.
The real clue is to not take the info as fact right off.
Older books have many errors. Internet loaded with errors.
The FHL & online is overloaded with errors from many who
sent in their lines.