I haven't found an Alice that fits, a search of just her Christian names and date of birth on 1939 would be a huge task
As sad as the research has been it was enjoyable and between us we have unearthed family you didn't know existed
Yes, people can disappear without trace, I have one of my own, wife and 2 children died and he just vanished, I can't wait for the 1921 census and hopefully I might find him, you might well find Alice in time, my one who vanished had an unusual surname, only 14 at one time in this country, he didn't go abroad either,
Watson brown , you also did a lot of research yourself which I found very helpful, I was very impressed if you don't mind my saying
Good luck in your future research
Louisa Maud
PS, I don't think you will find Alice on the electoral registers before about 1920 if my memory serves me correctly, please correct me if I am wrong, Mrs Pankhurst and her friends if you remember, but as always I stand to be corrected