Yes, I have located my Dads living half brothers & sisters, and traced their birth mothers family back 4 generations with DNA also confirming certificates. They are farmers from Higham Ferrers, Rushden.
My Dads birth mother was married to a man who had gone to Canada - whilst he was away my Dad was conceived - there is a record of the divorce on the National Archive - unfortunately, the archive doesn’t disclose who my Dads birth father was.
My Dads informal adoption records also show nothing.
I found my Dads half brother who had traced their mother in the 1970s - but although he asked about who his father was - his mother would not divulge anything.