Fiddling about on FindMyPast I thought I'd just see what the 1939 register looked like, never having had cause to look at it before. When was it released? I find some oddities.
I put in my grandmother's name Winifred Nation + year of birth 1890 and Somerset. 1 result for Winfred T Nation. Clicked on the image to find her correctly at Clayhill Farm Cannington Somerset, except that her second name was Frances and looks like a pretty clear F to me.
For some reason the transcription gives her occupation as "Chitlon Twictt Cottage" (Chilton Trivett Cottage is the preceding location!) Not really important but is such an occupation really very likely?
However, underneath her entry is one crossed through in red for Annie M Nation born clearly (in my opinion) on 6th November 1919 (transcribed as 5th Nov), who is single and a student. This was my mother (deceased 2008)....whose name only changed to Mead 3 years later in 1942 when she married ! (If you go to "See Page 16" it shows the same information except that the name Nation has been transcribed as Hatson.)
I think at the start of the line in the image is a date, 17/9/42? If so it looks like the register was "corrected" for single women just after they married, even several years later.
I checked my mother-in-law (once I eventually found her, and her parents, under Dorothy Berris when it looks fairly obviously like Burris to me) and the same thing is there, her married name added 3 years later.
Why was this done I wonder?
I also wonder how many folk are unable to find fairly recent information from this register ! I know it wasn't created for the likes of family research maniacs and I do understand that transcribers are supposed to transcribe what they see but .... (tongue in cheek: are they asked to take a sight test first and/or use their intelligence just a tiny bit??)